diff --git a/ChangeLog b/ChangeLog
index 7a6fc4a1b..edf63865e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,9 @@
  + Added feature #391, now the 'task color legend' command will show
    samples of all the defined colors and color rules from your .taskrc
    and theme.
+ + Added feature #410, and now task supports dependencies between tasks
+   with the syntax 'task 1 depends:2' to add a dependency, or 'task 1
+   depends:-2' to remove a dependency.
  + Added feature #421, and now task can sync data files from two sources
    via the 'merge' command.
  + Added feature #423, now custom report filters allow rc overrides.
diff --git a/NEWS b/NEWS
index 1fb47c513..031bca7a1 100644
--- a/NEWS
+++ b/NEWS
@@ -51,6 +51,10 @@ New configuration options in taskwarrior 1.9.3
     (e.g. merge.default.uri).
   - push.*.uri to configure target locations for the push command.
   - pull.*.uri to configure source locations for the pull command.
+  - dependency.confirm controls whether dependency chain repair needs to be
+    confirmed.
+  - dependency.reminder controls whether the user is nagged about dependency
+    chain violations.
 
 Newly deprecated features in taskwarrior 1.9.3
 
diff --git a/doc/man/taskrc.5 b/doc/man/taskrc.5
index d938c5583..d4b21eedd 100644
--- a/doc/man/taskrc.5
+++ b/doc/man/taskrc.5
@@ -520,6 +520,10 @@ specified, taskwarrior will only show as many that will fit.
 .B dependency.reminder=on
 Determines whether dependency chain violations generate reminders.
 
+.TP
+.B dependency.confirm=yes
+Determines whether dependency chain repair requires confirmation.
+
 .SS COLOR CONTROLS
 
 .TP
diff --git a/src/Config.cpp b/src/Config.cpp
index 76aa9bf38..e0c121a93 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -104,6 +104,7 @@ std::string Config::defaults =
   "\n"
   "# Dependency controls\n"
   "dependency.reminder=on                         # Nags on dependency chain violations\n"
+  "dependency.confirmation=on                     # Should dependency chain repair be confirmed?\n"
   "\n"
   "# Urgency Coefficients\n"
   "urgency.next.coefficient=10.0                  # Urgency coefficients for 'next' special tag\n"
@@ -649,13 +650,12 @@ std::string Config::checkForDeprecatedColor ()
   if (deprecated.size ())
   {
     out << "Your .taskrc file contains color settings that use deprecated "
-        << "underscores.  Please check:"
-        << std::endl;
+        << "underscores.  Please check:\n";
 
     foreach (i, deprecated)
-      out << "  " << *i << "=" << get (*i) << std::endl;
+      out << "  " << *i << "=" << get (*i) << "\n";
 
-    out << std::endl;
+    out << "\n";
   }
 
   return out.str ();
@@ -678,18 +678,17 @@ std::string Config::checkForDeprecatedColumns ()
   }
 
   std::stringstream out;
-  out << std::endl;
+  out << "\n";
 
   if (deprecated.size ())
   {
     out << "Your .taskrc file contains reports with deprecated columns.  "
-        << "Please check for entry_time, start_time or end_time in:"
-        << std::endl;
+        << "Please check for entry_time, start_time or end_time in:\n";
 
     foreach (i, deprecated)
-      out << "  " << *i << std::endl;
+      out << "  " << *i << "\n";
 
-    out << std::endl;
+    out << "\n";
   }
 
   return out.str ();
diff --git a/src/Context.cpp b/src/Context.cpp
index e07657cdc..2d9915efe 100644
--- a/src/Context.cpp
+++ b/src/Context.cpp
@@ -161,9 +161,9 @@ int Context::run ()
   if (config.getBoolean ("debug"))
     foreach (d, debugMessages)
       if (config.getBoolean ("color") || config.getBoolean ("_forcecolor"))
-        std::cout << colorizeDebug (*d) << std::endl;
+        std::cout << colorizeDebug (*d) << "\n";
       else
-        std::cout << *d << std::endl;
+        std::cout << *d << "\n";
   hooks.trigger ("post-debug");
 
   // Dump all headers.
@@ -171,9 +171,9 @@ int Context::run ()
   if (config.getBoolean ("verbose"))
     foreach (h, headers)
       if (config.getBoolean ("color") || config.getBoolean ("_forcecolor"))
-        std::cout << colorizeHeader (*h) << std::endl;
+        std::cout << colorizeHeader (*h) << "\n";
       else
-        std::cout << *h << std::endl;
+        std::cout << *h << "\n";
   hooks.trigger ("post-header");
 
   // Dump the report output.
@@ -186,9 +186,9 @@ int Context::run ()
   if (config.getBoolean ("verbose"))
     foreach (f, footnotes)
       if (config.getBoolean ("color") || config.getBoolean ("_forcecolor"))
-        std::cout << colorizeFootnote (*f) << std::endl;
+        std::cout << colorizeFootnote (*f) << "\n";
       else
-        std::cout << *f << std::endl;
+        std::cout << *f << "\n";
   hooks.trigger ("post-footnote");
 
   hooks.trigger ("pre-exit");
@@ -764,7 +764,7 @@ void Context::parse (
     else if (!foundNonSequence &&
              (parseTask.id != 0 || parseSequence.size () != 0))
     {
-      std::cout << "No command - assuming 'info'." << std::endl;
+      std::cout << "No command - assuming 'info'.\n";
       parseCmd.command = "info";
     }
   }
diff --git a/src/Permission.cpp b/src/Permission.cpp
index b62be6857..f9e399911 100644
--- a/src/Permission.cpp
+++ b/src/Permission.cpp
@@ -56,8 +56,7 @@ bool Permission::confirmed (const Task& task, const std::string& question)
   if (allConfirmed)
     return true;
 
-  std::cout << std::endl
-            << "Task "
+  std::cout << "\nTask "
             << task.id
             << " \""
             << task.get ("description")
@@ -69,7 +68,7 @@ bool Permission::confirmed (const Task& task, const std::string& question)
     std::cout << " (Recurring)";
   }
 
-  std::cout << std::endl;
+  std::cout << std::endl;  // Flush.
 
   int answer = confirm4 (question);
   if (answer == 2)
diff --git a/src/Table.cpp b/src/Table.cpp
index 1899b314a..e5ea2c070 100644
--- a/src/Table.cpp
+++ b/src/Table.cpp
@@ -416,7 +416,7 @@ void Table::calculateColumnWidths ()
   }
 
   // Try again, treating minimum columns as flexible.
-//  std::cout << "# no flexible columns.  Now what?" << std::endl;
+//  std::cout << "# no flexible columns.  Now what?\n";
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/Tree.cpp b/src/Tree.cpp
index d4bfeefed..900fd9f2b 100644
--- a/src/Tree.cpp
+++ b/src/Tree.cpp
@@ -314,7 +314,7 @@ void Tree::dumpNode (Tree* t, int depth)
   if (tags.length ())
     std::cout << " \033[32m" << tags << "\033[0m";
 
-  std::cout << std::endl;
+  std::cout << "\n";
 
   // Recurse for branches.
   for (int i = 0; i < t->branches (); ++i)
@@ -324,7 +324,7 @@ void Tree::dumpNode (Tree* t, int depth)
 ////////////////////////////////////////////////////////////////////////////////
 void Tree::dump ()
 {
-  std::cout << "Tree (" << count () << " nodes)" << std::endl;
+  std::cout << "Tree (" << count () << " nodes)\n";
   dumpNode (this, 1);
 }
 
diff --git a/src/command.cpp b/src/command.cpp
index 49c9cd99d..17a36dfc3 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -885,14 +885,15 @@ int handleShow (std::string &outs)
       "color.undo.after confirmation curses data.location dateformat "
       "dateformat.holiday dateformat.report dateformat.annotation debug "
       "default.command default.priority default.project defaultwidth due "
-      "dependency.reminder locale displayweeknumber export.ical.class "
-      "echo.command fontunderline locking monthsperline nag next journal.time "
-      "journal.time.start.annotation journal.time.stop.annotation project "
-      "shadow.command shadow.file shadow.notify weekstart editor "
-      "import.synonym.id import.synonym.uuid complete.all.projects "
-      "complete.all.tags search.case.sensitive hooks active.indicator "
-      "tag.indicator recurrence.indicator recurrence.limit list.all.projects "
-      "list.all.tags undo.style verbose rule.precedence.color merge.autopush "
+      "dependency.confirmation dependency.reminder locale displayweeknumber "
+      "export.ical.class echo.command fontunderline locking monthsperline nag "
+      "next journal.time journal.time.start.annotation "
+      "journal.time.stop.annotation project shadow.command shadow.file "
+      "shadow.notify weekstart editor import.synonym.id import.synonym.uuid "
+      "complete.all.projects complete.all.tags search.case.sensitive hooks "
+      "active.indicator tag.indicator recurrence.indicator recurrence.limit "
+      "list.all.projects list.all.tags undo.style verbose rule.precedence.color "
+      "merge.autopush "
 #ifdef FEATURE_SHELL
       "shell.prompt "
 #endif
diff --git a/src/custom.cpp b/src/custom.cpp
index 9ec1240f2..774ba5702 100644
--- a/src/custom.cpp
+++ b/src/custom.cpp
@@ -533,12 +533,19 @@ int handleCustomReport (const std::string& report, std::string &outs)
         table.setColumnJustification (columnCount, Table::left);
 
         int row = 0;
-        std::vector <int> all;
+        std::vector <Task> blocked;
+        std::vector <int> blocked_ids;
         std::string deps;
         foreach (task, tasks)
         {
-          task->getDependencies (all);
-          join (deps, ", ", all);
+          dependencyGetBlocking (*task, blocked);
+          foreach (b, blocked)
+            blocked_ids.push_back (b->id);
+
+          join (deps, ",", blocked_ids);
+          blocked_ids.clear ();
+          blocked.clear ();
+
           context.hooks.trigger ("format-depends", "depends", deps);
           table.addCell (row++, columnCount, deps);
         }
diff --git a/src/dependency.cpp b/src/dependency.cpp
index 6bded8248..8f0f6ec27 100644
--- a/src/dependency.cpp
+++ b/src/dependency.cpp
@@ -31,16 +31,16 @@
 #include <Context.h>
 #include <text.h>
 #include <util.h>
+#include <main.h>
 
 extern Context context;
 
 ////////////////////////////////////////////////////////////////////////////////
-static bool followUpstream (const Task&, const Task&, const std::vector <Task>&,
-                            std::vector <std::string>&);
+static bool followUpstream (const Task&, const Task&, std::vector <std::string>&);
 
 ////////////////////////////////////////////////////////////////////////////////
 // A task is blocked if it depends on tasks that are pending or waiting.
-bool dependencyIsBlocked (Task& task)
+bool dependencyIsBlocked (const Task& task)
 {
   if (task.has ("depends"))
   {
@@ -58,26 +58,25 @@ bool dependencyIsBlocked (Task& task)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-void dependencyGetBlocked (Task& task, std::vector <Task>& blocked)
+void dependencyGetBlocked (const Task& task, std::vector <Task>& blocked)
 {
-  std::string depends = task.get ("depends");
-  if (depends != "")
-  {
-    const std::vector <Task>& all = context.tdb.getAllPending ();
-    std::vector <Task>::const_iterator it;
-    for (it = all.begin (); it != all.end (); ++it)
-      if ((it->getStatus () == Task::pending  ||
-           it->getStatus () == Task::waiting) &&
-          depends.find (it->get ("uuid")) != std::string::npos)
-        blocked.push_back (*it);
-  }
+  std::string uuid = task.get ("uuid");
+
+  const std::vector <Task>& all = context.tdb.getAllPending ();
+  std::vector <Task>::const_iterator it;
+  for (it = all.begin (); it != all.end (); ++it)
+    if ((it->getStatus () == Task::pending  ||
+         it->getStatus () == Task::waiting) &&
+        it->has ("depends")                 &&
+        it->get ("depends").find (uuid) != std::string::npos)
+      blocked.push_back (*it);
 }
 
 
 ////////////////////////////////////////////////////////////////////////////////
 // To be a blocking task, there must be at least one other task that depends on
 // this task, that is either pending or waiting.
-bool dependencyIsBlocking (Task& task)
+bool dependencyIsBlocking (const Task& task)
 {
   std::string uuid = task.get ("uuid");
 
@@ -94,18 +93,19 @@ bool dependencyIsBlocking (Task& task)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-void dependencyGetBlocking (Task& task, std::vector <Task>& blocking)
+void dependencyGetBlocking (const Task& task, std::vector <Task>& blocking)
 {
-  std::string uuid = task.get ("uuid");
-
-  const std::vector <Task>& all = context.tdb.getAllPending ();
-  std::vector <Task>::const_iterator it;
-  for (it = all.begin (); it != all.end (); ++it)
-    if ((it->getStatus () == Task::pending  ||
-         it->getStatus () == Task::waiting) &&
-        it->has ("depends")                 &&
-        it->get ("depends").find (uuid) != std::string::npos)
-      blocking.push_back (*it);
+  std::string depends = task.get ("depends");
+  if (depends != "")
+  {
+    const std::vector <Task>& all = context.tdb.getAllPending ();
+    std::vector <Task>::const_iterator it;
+    for (it = all.begin (); it != all.end (); ++it)
+      if ((it->getStatus () == Task::pending  ||
+           it->getStatus () == Task::waiting) &&
+          depends.find (it->get ("uuid")) != std::string::npos)
+        blocking.push_back (*it);
+  }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -118,12 +118,10 @@ void dependencyGetBlocking (Task& task, std::vector <Task>& blocking)
 //   Keep walking the chain, recording the links (a --> b, b --> c, ...) until
 //   either the end of the chain is found (therefore not circular), or the chain
 //   loops and a repeat link is spotted (therefore circular).
-bool dependencyIsCircular (Task& task)
+bool dependencyIsCircular (const Task& task)
 {
-  std::vector <std::string> links;
-  const std::vector <Task>& all = context.tdb.getAllPending ();
-
-  return followUpstream (task, task, all, links);
+  std::vector <std::string> seen;
+  return followUpstream (task, task, seen);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -132,50 +130,27 @@ bool dependencyIsCircular (Task& task)
 static bool followUpstream (
   const Task& task,
   const Task& original,
-  const std::vector <Task>& all,
-  std::vector <std::string>& links)
+  std::vector <std::string>& seen)
 {
-  if (task.has ("depends"))
+  std::vector <Task> blocking;
+  dependencyGetBlocking (task, blocking);
+  foreach (b, blocking)
   {
-    std::vector <std::string> uuids;
-    split (uuids, task.get ("depends"), ',');
+    std::string link = task.get ("uuid") + " -> " + b->get ("uuid");
 
-    std::vector <std::string>::iterator outer;
-    for (outer = uuids.begin (); outer != uuids.end (); ++outer)
-    {
-      // Check that link has not already been seen.
+    // Have we seen this link before?  If so, circularity has been detected.
+    if (std::find (seen.begin (), seen.end (), link) != seen.end ())
+      return true;
 
-      // This is the actual circularity check - the rest of this function is
-      // just chain-walking.
-      std::string link = task.get ("uuid") + " -> " + *outer;
-      if (std::find (links.begin (), links.end (), link) != links.end ())
-        return true;
+    seen.push_back (link);
 
-      links.push_back (link);
-
-      // Recurse up the chain.
-      std::vector <Task>::const_iterator inner;
-      for (inner = all.begin (); inner != all.end (); ++inner)
-      {
-        if (*outer == inner->get ("uuid"))
-        {
-          // Use the newly modified "task", not "*inner", which is the old
-          // unmodified version.
-          if (*outer == original.get ("uuid"))
-          {
-            if (followUpstream (task, original, all, links))
-              return true;
-          }
-          else
-          {
-            if (followUpstream (*inner, original, all, links))
-              return true;
-          }
-
-          break;
-        }
-      }
-    }
+    // Use 'original' over '*b' if they both refer to the same task, otherwise
+    // '*b' is from TDB's committed list, and lacks recent modifications.
+    if (followUpstream (
+          (b->get ("uuid") == original.get ("uuid") ? original : *b),
+          original,
+          seen))
+      return true;
   }
 
   return false;
@@ -215,35 +190,49 @@ void dependencyChainOnComplete (Task& task)
   std::vector <Task> blocking;
   dependencyGetBlocking (task, blocking);
 
-  std::cout << "# Task " << task.id << "\n";
-  foreach (t, blocking)
-    std::cout << "#  blocking " << t->id << " " << t->get ("uuid") << "\n";
-
   // If the task is anything but the tail end of a dependency chain.
   if (blocking.size ())
   {
     std::vector <Task> blocked;
     dependencyGetBlocked (task, blocked);
 
-    foreach (t, blocked)
-      std::cout << "#  blocked by " << t->id << " " << t->get ("uuid") << "\n";
+    // Nag about broken chain.
+    if (context.config.getBoolean ("dependency.reminder"))
+    {
+      std::cout << "Task " << task.id << " is blocked by:\n";
+      foreach (b, blocking)
+        std::cout << "  " << b->id << " " << b->get ("description") << "\n";
+    }
 
     // If there are both blocking and blocked tasks, the chain is broken.
     if (blocked.size ())
     {
-      // TODO Nag about broken chain.
-      std::cout << "# Chain broken - offer to repair\n";
-
-      // TODO Confirm that the chain should be repaired.
-
-      // Repair the chain - everything in blocked should now depend on
-      // everything in blocking, instead of task.id.
-      foreach (left, blocked)
+      if (context.config.getBoolean ("dependency.reminder"))
       {
-        left->removeDependency (task.id);
+        std::cout << "and is blocking:\n";
+        foreach (b, blocked)
+          std::cout << "  " << b->id << " " << b->get ("description") << "\n";
+      }
+
+      if (!context.config.getBoolean ("dependency.confirmation") ||
+          confirm ("Would you like the dependency chain fixed?"))
+      {
+        // Repair the chain - everything in blocked should now depend on
+        // everything in blocking, instead of task.id.
+        foreach (left, blocked)
+        {
+          left->removeDependency (task.id);
+
+          foreach (right, blocking)
+            left->addDependency (right->id);
+        }
+
+        // Now update TDB, now that the updates have all occurred.
+        foreach (left, blocked)
+          context.tdb.update (*left);
 
         foreach (right, blocking)
-          left->addDependency (right->id);
+          context.tdb.update (*right);
       }
     }
   }
@@ -252,27 +241,64 @@ void dependencyChainOnComplete (Task& task)
 ////////////////////////////////////////////////////////////////////////////////
 void dependencyChainOnStart (Task& task)
 {
-  std::stringstream out;
-
-  if (context.config.getBoolean ("dependency.reminder") /* &&
-       TODO check that task is actually blocked */)
+  if (context.config.getBoolean ("dependency.reminder"))
   {
-    out << "# dependencyChainScan nag! "
-        << task.id
-        << " "
-        << task.get ("uuid")
-        << "\n";
+    std::vector <Task> blocking;
+    dependencyGetBlocking (task, blocking);
 
-    context.footnote (out.str ());
+    // If the task is anything but the tail end of a dependency chain, nag about
+    // broken chain.
+    if (blocking.size ())
+    {
+      std::cout << "Task " << task.id << " is blocked by:\n";
+      foreach (b, blocking)
+        std::cout << "  " << b->id << " " << b->get ("description") << "\n";
+    }
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// Iff a dependency is being removed, is there something to do.
 void dependencyChainOnModify (Task& before, Task& after)
 {
-  // TODO Iff a dependency is being removed, is there anything to do.
+  // TODO It is not clear that this should even happen.  TBD.
+/*
+  // Get the dependencies from before.
+  std::string depends = before.get ("depends");
+  std::vector <std::string> before_depends;
+  split (before_depends, depends, ',');
+  std::cout << "# dependencyChainOnModify before has " << before_depends.size () << "\n";
 
+  // Get the dependencies from after.
+  depends = after.get ("depends");
+  std::vector <std::string> after_depends;
+  split (after_depends, depends, ',');
+  std::cout << "# dependencyChainOnModify after has " << after_depends.size () << "\n";
 
+  // listDiff
+  std::vector <std::string> before_only;
+  std::vector <std::string> after_only;
+  listDiff (before_depends, after_depends, before_only, after_only);
+
+  // Any dependencies in before_only indicates that a dependency was removed.
+  if (before_only.size ())
+  {
+    std::cout << "# dependencyChainOnModify detected a dependency removal\n";
+
+    // before   dep:2,3
+    // after    dep:2
+    // 
+    // any tasks blocked by after might should be repaired to depend on 3.
+
+    std::vector <Task> blocked;
+    dependencyGetBlocked (after, blocked);
+
+    foreach (b, blocked)
+    {
+      std::cout << "# dependencyChainOnModify\n";
+    }
+  }
+*/
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/import.cpp b/src/import.cpp
index 2b6307181..aa9d0df41 100644
--- a/src/import.cpp
+++ b/src/import.cpp
@@ -338,8 +338,7 @@ static std::string importTask_1_4_3 (const std::vector <std::string>& lines)
       << (lines.size () - failed.size () - 1)
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -500,8 +499,7 @@ static std::string importTask_1_5_0 (const std::vector <std::string>& lines)
       << (lines.size () - failed.size () - 1)
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -663,8 +661,7 @@ static std::string importTask_1_6_0 (const std::vector <std::string>& lines)
       << (lines.size () - failed.size () - 1)
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -711,8 +708,7 @@ static std::string importTaskCmdLine (const std::vector <std::string>& lines)
       << (lines.size () - failed.size ())
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -840,8 +836,7 @@ static std::string importTodoSh_2_0 (const std::vector <std::string>& lines)
       << (lines.size () - failed.size ())
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -904,8 +899,7 @@ static std::string importText (const std::vector <std::string>& lines)
       << count
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -1150,8 +1144,7 @@ static std::string importCSV (const std::vector <std::string>& lines)
       << (lines.size () - failed.size () - 1)
       << " tasks successfully, with "
       << failed.size ()
-      << " errors."
-      << std::endl;
+      << " errors.\n";
 
   if (failed.size ())
   {
@@ -1255,8 +1248,7 @@ static std::string importYAML (const std::vector <std::string>& lines)
   std::stringstream out;
   out << "Imported "
       << count
-      << " tasks successfully."
-      << std::endl;
+      << " tasks successfully.\n";
 
   return out.str ();
 }
diff --git a/src/main.cpp b/src/main.cpp
index 9d9145099..2ea3b5bd1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -76,13 +76,13 @@ int main (int argc, char** argv)
 
   catch (std::string& error)
   {
-    std::cout << error << std::endl;
+    std::cout << error << "\n";
     return -1;
   }
 
   catch (...)
   {
-    std::cerr << context.stringtable.get (100, "Unknown error.") << std::endl;
+    std::cerr << context.stringtable.get (100, "Unknown error.") << "\n";
     return -2;
   }
 
diff --git a/src/main.h b/src/main.h
index 02ef80421..fd8fe18cf 100644
--- a/src/main.h
+++ b/src/main.h
@@ -135,11 +135,11 @@ int handleExportiCal (std::string &);
 int handleExportYAML (std::string &);
 
 // dependency.cpp
-bool dependencyIsBlocked (Task&);
-void dependencyGetBlocked (Task&, std::vector <Task>&);
-bool dependencyIsBlocking (Task&);
-void dependencyGetBlocking (Task&, std::vector <Task>&);
-bool dependencyIsCircular (Task&);
+bool dependencyIsBlocked (const Task&);
+void dependencyGetBlocked (const Task&, std::vector <Task>&);
+bool dependencyIsBlocking (const Task&);
+void dependencyGetBlocking (const Task&, std::vector <Task>&);
+bool dependencyIsCircular (const Task&);
 void dependencyChainOnComplete (Task&);
 void dependencyChainOnStart (Task&);
 void dependencyChainOnModify (Task&, Task&);
diff --git a/src/recur.cpp b/src/recur.cpp
index f2f9c235f..198f03a1f 100644
--- a/src/recur.cpp
+++ b/src/recur.cpp
@@ -74,8 +74,7 @@ void handleRecurrence ()
       {
         std::cout << "Task ("
                   << trim (t->get ("description"))
-                  << ") has past its 'until' date, and has been deleted."
-                  << std::endl;
+                  << ") has past its 'until' date, and has been deleted.\n";
 
         // Determine the end date.
         char endTime[16];
@@ -472,11 +471,12 @@ bool nag (Task& task)
     }
 
     // General form is "if there are no more deserving tasks", suppress the nag.
-    if (isOverdue                                         ) return false;
-    if (pri == 'H' && !overdue                            ) return false;
-    if (pri == 'M' && !overdue && !high                   ) return false;
-    if (pri == 'L' && !overdue && !high && !medium        ) return false;
-    if (pri == ' ' && !overdue && !high && !medium && !low) return false;
+    if (isOverdue                                                 ) return false;
+    if (pri == 'H' && !overdue                                    ) return false;
+    if (pri == 'M' && !overdue && !high                           ) return false;
+    if (pri == 'L' && !overdue && !high && !medium                ) return false;
+    if (pri == ' ' && !overdue && !high && !medium && !low        ) return false;
+    if (dependencyIsBlocking (task) && !dependencyIsBlocked (task)) return false;
 
     // All the excuses are made, all that remains is to nag the user.
     context.footnote (nagMessage);
diff --git a/src/report.cpp b/src/report.cpp
index 2ffafd2eb..943e7630a 100644
--- a/src/report.cpp
+++ b/src/report.cpp
@@ -444,7 +444,7 @@ int handleInfo (std::string &outs)
       // dependencies: blocked
       {
         std::vector <Task> blocked;
-        dependencyGetBlocked (*task, blocked);
+        dependencyGetBlocking (*task, blocked);
         if (blocked.size ())
         {
           std::stringstream message;
@@ -461,7 +461,7 @@ int handleInfo (std::string &outs)
       // dependencies: blocking
       {
         std::vector <Task> blocking;
-        dependencyGetBlocking (*task, blocking);
+        dependencyGetBlocked (*task, blocking);
         if (blocking.size ())
         {
           std::stringstream message;
@@ -2633,6 +2633,22 @@ void gatherNextTasks (std::vector <Task>& tasks)
     }
   }
 
+  // blocking, not blocked
+  foreach (task, tasks)
+  {
+    if (dependencyIsBlocking (*task) &&
+        ! dependencyIsBlocked (*task))
+    {
+      std::string project = task->get ("project");
+      if (countByProject[project] < limit && matching.find (task->id) == matching.end ())
+      {
+        ++countByProject[project];
+        matching[task->id] = true;
+        filtered.push_back (*task);
+      }
+    }
+  }
+
   // due:*, pri:H
   foreach (task, tasks)
   {
diff --git a/src/rules.cpp b/src/rules.cpp
index 88cf084ee..86cf718e6 100644
--- a/src/rules.cpp
+++ b/src/rules.cpp
@@ -81,7 +81,7 @@ void initializeColorRules ()
 static void colorizeBlocked (Task& task, const std::string& rule, Color& c)
 {
   if (gsColor[rule].nontrivial ())
-    if (task.get ("depends") != "")
+    if (dependencyIsBlocked (task))
       c.blend (gsColor[rule]);
 }
 
diff --git a/src/tests/dependencies.t b/src/tests/dependencies.t
index f24c311e2..688741248 100755
--- a/src/tests/dependencies.t
+++ b/src/tests/dependencies.t
@@ -28,59 +28,71 @@
 
 use strict;
 use warnings;
-use Test::More tests => 39;
+use Test::More tests => 41;
 
 # Create the rc file.
 if (open my $fh, '>', 'dep.rc')
 {
   print $fh "data.location=.\n";
-  print $fh "dependency.confirm=yes\n";
+  print $fh "dependency.confirmation=yes\n";
   print $fh "report.depreport.columns=id,depends,description\n";
   print $fh "report.depreport.labels=ID,Depends,Description\n";
   print $fh "report.depreport.filter=status:pending\n";
   print $fh "report.depreport.sort=depends+\n";
-  print $fh "nag=NAG";
   close $fh;
 
+  # [1]
   ok (-r 'dep.rc', 'Created dep.rc');
 }
 
 qx{../task rc:dep.rc add One};
 qx{../task rc:dep.rc add Two};
 
+# [2]
 my $output = qx{../task rc:dep.rc 1 dep:-2};
 like ($output, qr/Modified 0 tasks\./, 'dependencies - remove nonexistent dependency');
 
+# [3]
 $output = qx{../task rc:dep.rc 1 dep:99};
 like ($output, qr/Could not create a dependency on task 99 - not found\./, 'dependencies - add dependency for nonexistent task');
 
+# [4]
 $output = qx{../task rc:dep.rc 99 dep:1};
 like ($output, qr/Task 99 not found\./, 'dependencies - add dependency to nonexistent task');
 
-# t 1 dep:2; t info 1 => blocked by 2
+# [5,6] t 1 dep:2; t info 1 => blocked by 2
 $output = qx{../task rc:dep.rc 1 dep:2; ../task rc:dep.rc info 1};
 like ($output, qr/This task blocked by\s+2 Two\nUUID/, 'dependencies - trivial blocked');
 unlike ($output, qr/This task is blocking\n/,          'dependencies - trivial blocked');
 
-# t info 2 => blocking 1
+# [7,8] t info 2 => blocking 1
 $output = qx{../task rc:dep.rc info 2};
 unlike ($output, qr/This task blocked by/,              'dependencies - trivial blocking');
 like ($output, qr/This task is blocking\s+1 One\nUUID/, 'dependencies - trivial blocking');
 
-# t 1 dep:2 (again)
+# [9] t 1 dep:2 (again)
 $output = qx{../task rc:dep.rc 1 dep:2};
 like ($output, qr/Task 1 already depends on task 2\./, 'dependencies - add already existing dependency');
 
-# t 1 dep:1 => error
+# [10,11] t 1 dep:1 => error
 $output = qx{../task rc:dep.rc 1 dep:1};
 like   ($output, qr/A task cannot be dependent on itself\./, 'dependencies - cannot depend on self');
 unlike ($output, qr/Modified 1 task\./,                      'dependencies - cannot depend on self');
 
-# t 1 dep:2; t 2 dep:1 => error
+# [12,13] t 1 dep:2; t 2 dep:1 => error
 $output = qx{../task rc:dep.rc 2 dep:1};
 like   ($output, qr/Circular dependency detected and disallowed\./, 'dependencies - trivial circular');
 unlike ($output, qr/Modified 1 task\./,                             'dependencies - trivial circular');
 
+# [14,15] t 1 dep:2; t 2 dep:3; t 1 dep:3 => not circular
+qx{../task rc:dep.rc 1 dep:2};
+qx{../task rc:dep.rc add Three};
+qx{../task rc:dep.rc 2 dep:3};
+$output = qx{../task rc:dep.rc 1 dep:3};
+unlike ($output, qr/Circular dependency detected and disallowed\./, 'dependencies - diamond, non-circular');
+like   ($output, qr/Modified 1 task\./,                             'dependencies - diamond, non-circular');
+
+# [16]
 unlink 'pending.data';
 ok (!-r 'pending.data', 'Removed pending.data for a fresh start');
 
@@ -92,11 +104,12 @@ qx{../task rc:dep.rc add Five};
 
 qx{../task rc:dep.rc 5 dep:4; ../task rc:dep.rc 4 dep:3; ../task rc:dep.rc 3 dep:2; ../task rc:dep.rc 2 dep:1};
 
-# 5 dep 4 dep 3 dep 2 dep 1 dep 5 => error
+# [17,18] 5 dep 4 dep 3 dep 2 dep 1 dep 5 => error
 $output = qx{../task rc:dep.rc 1 dep:5};
 like   ($output, qr/Circular dependency detected and disallowed\./, 'dependencies - nontrivial circular');
 unlike ($output, qr/Modified 1 task\./,                             'dependencies - nontrivial circular');
 
+# [19]
 unlink 'pending.data';
 ok (!-r 'pending.data', 'Removed pending.data for a fresh start');
 
@@ -107,23 +120,28 @@ qx{../task rc:dep.rc add Four};
 qx{../task rc:dep.rc add Five};
 qx{../task rc:dep.rc add Six recurring due:tomorrow recur:daily};
 
+# [20]
 $output = qx{../task rc:dep.rc 6 dep:5};
-unlike ($output,qr/Modified \d+ task/, 'dependencies - recurring task depending on another task');
+like ($output, qr/Modified \d+ task/, 'dependencies - recurring task depending on another task');
 
+# [21]
 $output = qx{../task rc:dep.rc 5 dep:6};
-like ($output,qr/Modified \d+ task/, 'dependencies - task depending on recurring task');
+like ($output, qr/Modified \d+ task/, 'dependencies - task depending on recurring task');
 
-# t 1 dep:2,3,4; t 1 dep:-2,-4,5; t info 1 => blocked by 3,5
+# [22] t 1 dep:2,3,4; t 1 dep:-2,-4,5; t info 1 => blocked by 3,5
 $output = qx{../task rc:dep.rc 1 dep:2,3,4; ../task rc:dep.rc 1 dep:-2,-4,5; ../task rc:dep.rc info 1};
-like ($output, qr/This task blocked by\s+3 Three\n\s+5 Five\nThis task is blocking/, 'dependencies - multiple dependencies modified');
+like ($output, qr/This task blocked by\s+3 Three\n\s+5 Five\nUUID/, 'dependencies - multiple dependencies modified');
 
+# [23,24]
 $output = qx{../task rc:dep.rc do 3,5; ../task rc:dep.rc info 1};
 unlike ($output, qr/This task blocked by/, 'dependencies - task info reflects completed dependencies');
 unlike ($output, qr/This task is blocking/, 'dependencies - task info reflects completed dependencies');
 
+# [25]
 $output = qx{../task rc:dep.rc depreport};
 like ($output, qr/\s1\s+One\s+/, 'dependencies - depends report column reflects completed dependencies');
 
+# [26]
 unlink 'pending.data';
 ok (!-r 'pending.data', 'Removed pending.data for a fresh start');
 
@@ -135,12 +153,16 @@ qx{../task rc:dep.rc add Four};
 qx{../task rc:dep.rc 1 dep:3,4};
 qx{../task rc:dep.rc do 2};
 
+# [27]
 $output = qx{../task rc:dep.rc depreport};
-like ($output, qr/\s1\s+2, 3\s+One\s+/, 'dependencies - depends report column reflects changed IDs');
+like ($output, qr/\s1\s+2,3\s+One\s+/, 'dependencies - depends report column reflects changed IDs');
 
+# [28]
+qx{../task rc:dep.rc do 3};
 $output = qx{../task rc:dep.rc depreport};
-like ($output, qr/\s1\s+One\s+/, 'dependencies - depends report column reflects completed dependencies');
+like ($output, qr/\s1\s+2\s+One\s+/, 'dependencies - depends report column reflects completed dependencies');
 
+# [29]
 unlink 'pending.data';
 ok (!-r 'pending.data', 'Removed pending.data for a fresh start');
 
@@ -151,17 +173,20 @@ qx{../task rc:dep.rc add Four};
 
 qx{../task rc:dep.rc 2 dep:1; ../task rc:dep.rc 3 dep:2; ../task rc:dep.rc 4 dep:3};
 
+# [30,31]
 $output = qx{echo y | ../task rc:dep.rc do 2};
 like ($output, qr/fixed/, 'dependencies - user prompted to fix broken chain after completing a blocked task');
+like ($output, qr/is blocked by/, 'dependencies - user nagged for completing a blocked task');
 
-like ($output, qr/NAG/, 'dependencies - user nagged for completing a blocked task');
-
+# [32]
 $output = qx{echo y | ../task rc:dep.rc do 1};
 unlike ($output, qr/fixed/, 'dependencies - user not prompted to fix broken chain when the head of the chain is marked as complete');
 
+# [33]
 $output = qx{echo y | ../task rc:dep.rc del 4};
 unlike ($output, qr/fixed/, 'dependencies - user not prompted to fix broken chain when the tail of the chain is deleted');
 
+# [34]
 unlink 'pending.data';
 ok (!-r 'pending.data', 'Removed pending.data for a fresh start');
 
@@ -176,20 +201,22 @@ qx{../task rc:dep.rc 3 dep:2};
 qx{../task rc:dep.rc 4 dep:3};
 qx{../task rc:dep.rc 5 dep:4};
 
+# [35]
 qx{echo y | ../task rc:dep.rc do 2};
 $output = qx{../task rc:dep.rc depreport};
-
 like ($output, qr/\s1\s+One\s*\n\s2\s+1\s+Three\s*\n\s3\s+2\s+Four\s*\n\s4\s+3\s+Five/, 'dependencies - fixed chain after completing a blocked task');
 
+# [36]
 qx{printf "Y\nY\n" | ../task rc:dep.rc del 2}; 
 $output = qx{../task rc:dep.rc depreport};
 like ($output, qr/\s1\s+One\s*\n\s2\s+1\s+Four\s*\n\s3\s+2\s+Five/, 'dependencies - fixed chain after deleting a blocked task');
 
+# [37]
 qx{../task rc:dep.rc 2 dep:-1}; 
 $output = qx{../task rc:dep.rc depreport};
 like ($output, qr/\s1\s+One\s*\n\s2\s+Four\s*\n\s3\s+2\s+Five/, 'dependencies - chain should not be automatically repaired after manually removing a dependency');
 
-# TODO - test dependency.confirm config variable
+# TODO - test dependency.confirmation config variable
 # TODO - test undo on backing out chain gap repair
 # TODO - test undo on backing out choice to not perform chain gap repair
 # TODO - test blocked task completion nag
diff --git a/src/tests/sensor.t.cpp b/src/tests/sensor.t.cpp
index 4a0cac280..5314c0d79 100644
--- a/src/tests/sensor.t.cpp
+++ b/src/tests/sensor.t.cpp
@@ -50,7 +50,7 @@ int main (int argc, char** argv)
   std::ofstream one ("./sensor.foo", std::ios_base::out | std::ios_base::app);
   if (one.good ())
   {
-    one << "touch" << std::endl;
+    one << "touch\n";
     one.close ();
   }
 
@@ -65,7 +65,7 @@ int main (int argc, char** argv)
   std::ofstream two ("./sensor.foo", std::ios_base::out | std::ios_base::app);
   if (two.good ())
   {
-    two << "touch" << std::endl;
+    two << "touch\n";
     two.close ();
   }
 
diff --git a/src/tests/test.cpp b/src/tests/test.cpp
index d29039138..313dec9c1 100644
--- a/src/tests/test.cpp
+++ b/src/tests/test.cpp
@@ -50,7 +50,7 @@ UnitTest::UnitTest (int planned)
 , mFailed (0)
 , mSkipped (0)
 {
-  std::cout << "1.." << mPlanned << std::endl;
+  std::cout << "1.." << mPlanned << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -66,8 +66,7 @@ UnitTest::~UnitTest ()
               << mCounter
               << " tests, out of a planned "
               << mPlanned
-              << " were run."
-              << std::endl;
+              << " were run.\n";
     mSkipped += mPlanned - mCounter;
   }
 
@@ -76,8 +75,7 @@ UnitTest::~UnitTest ()
               << mCounter
               << " tests were run, but only "
               << mPlanned
-              << " were planned."
-              << std::endl;
+              << " were planned.\n";
 
   std::cout << "# "
             << mPassed
@@ -87,8 +85,7 @@ UnitTest::~UnitTest ()
             << mSkipped
             << " skipped. "
             << std::setprecision (3) << percentPassed
-            << "% passed."
-            << std::endl;
+            << "% passed.\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -100,14 +97,14 @@ void UnitTest::plan (int planned)
   mFailed = 0;
   mSkipped = 0;
 
-  std::cout << "1.." << mPlanned << std::endl;
+  std::cout << "1.." << mPlanned << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 void UnitTest::planMore (int extra)
 {
   mPlanned += extra;
-  std::cout << "1.." << mPlanned << std::endl;
+  std::cout << "1.." << mPlanned << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -122,7 +119,7 @@ void UnitTest::ok (bool expression, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -131,7 +128,7 @@ void UnitTest::ok (bool expression, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -147,7 +144,7 @@ void UnitTest::notok (bool expression, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -156,7 +153,7 @@ void UnitTest::notok (bool expression, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -171,7 +168,7 @@ void UnitTest::is (bool actual, bool expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -180,13 +177,11 @@ void UnitTest::is (bool actual, bool expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: "
+              << "\n# expected: "
               << expected
-              << std::endl
-              << "#      got: "
+              << "\n#      got: "
               << actual
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -201,7 +196,7 @@ void UnitTest::is (size_t actual, size_t expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -210,13 +205,11 @@ void UnitTest::is (size_t actual, size_t expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: "
+              << "\n# expected: "
               << expected
-              << std::endl
-              << "#      got: "
+              << "\n#      got: "
               << actual
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -231,7 +224,7 @@ void UnitTest::is (int actual, int expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -240,13 +233,11 @@ void UnitTest::is (int actual, int expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: "
+              << "\n# expected: "
               << expected
-              << std::endl
-              << "#      got: "
+              << "\n#      got: "
               << actual
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -261,7 +252,7 @@ void UnitTest::is (double actual, double expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -270,13 +261,11 @@ void UnitTest::is (double actual, double expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: "
+              << "\n# expected: "
               << expected
-              << std::endl
-              << "#      got: "
+              << "\n#      got: "
               << actual
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -291,7 +280,7 @@ void UnitTest::is (char actual, char expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -300,13 +289,11 @@ void UnitTest::is (char actual, char expected, const std::string& name)
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: "
+              << "\n# expected: "
               << expected
-              << std::endl
-              << "#      got: "
+              << "\n#      got: "
               << actual
-              << std::endl;
+              << "\n";
   }
 }
 
@@ -324,7 +311,7 @@ void UnitTest::is (
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -333,15 +320,12 @@ void UnitTest::is (
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: '"
+              << "\n# expected: '"
               << expected
               << "'"
-              << std::endl
-              << "#      got: '"
+              << "\n#      got: '"
               << actual
-              << "'"
-              << std::endl;
+              << "'\n";
   }
 }
 
@@ -359,7 +343,7 @@ void UnitTest::is (
               << mCounter
               << " - "
               << name
-              << std::endl;
+              << "\n";
   }
   else
   {
@@ -368,15 +352,12 @@ void UnitTest::is (
               << mCounter
               << " - "
               << name
-              << std::endl
-              << "# expected: '"
+              << "\n# expected: '"
               << expected
               << "'"
-              << std::endl
-              << "#      got: '"
+              << "\n#      got: '"
               << actual
-              << "'"
-              << std::endl;
+              << "'\n";
   }
 }
 
@@ -385,7 +366,7 @@ void UnitTest::diag (const std::string& text)
 {
   std::string trimmed = trim (text, " \t\n\r\f");
 
-  std::cout << "# " << trimmed << std::endl;
+  std::cout << "# " << trimmed << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -397,7 +378,7 @@ void UnitTest::pass (const std::string& text)
             << mCounter
             << " "
             << text
-            << std::endl;
+            << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -409,7 +390,7 @@ void UnitTest::fail (const std::string& text)
             << mCounter
             << " "
             << text
-            << std::endl;
+            << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -421,7 +402,7 @@ void UnitTest::skip (const std::string& text)
             << mCounter
             << " "
             << text
-            << std::endl;
+            << "\n";
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/ui/interactive.cpp b/src/ui/interactive.cpp
index 847eece20..40a88fb75 100644
--- a/src/ui/interactive.cpp
+++ b/src/ui/interactive.cpp
@@ -68,10 +68,10 @@ int Context::handleInteractive ()
   }
 
   // TODO Integrate regular task error handling, using Context::debug.
-  catch (int e)          { std::cout << e << std::endl; }
-  catch (const char* e)  { std::cout << e << std::endl; }
-  catch (std::string& e) { std::cout << e << std::endl; }
-  catch (...)            { std::cout << "Unknown error." << std::endl; }
+  catch (int e)          { std::cout << e << "\n"; }
+  catch (const char* e)  { std::cout << e << "\n"; }
+  catch (std::string& e) { std::cout << e << "\n"; }
+  catch (...)            { std::cout << "Unknown error.\n"; }
 
   logWrite ("---");