diff --git a/src/tests/add.t b/src/tests/add.t
index 26a82f0ee..db6f5c553 100755
--- a/src/tests/add.t
+++ b/src/tests/add.t
@@ -63,7 +63,7 @@ like ($output, qr/Status\s+Pending\n/, 'add Pending');
 
 # Cleanup.
 unlink 'pending.data';
-ok (!-r 'pendind.data', 'Removed pending.data');
+ok (!-r 'pending.data', 'Removed pending.data');
 
 unlink 'add.rc';
 ok (!-r 'add.rc', 'Removed add.rc');
diff --git a/src/tests/bug_hang.t b/src/tests/bug_hang.t
new file mode 100755
index 000000000..dbe229919
--- /dev/null
+++ b/src/tests/bug_hang.t
@@ -0,0 +1,83 @@
+#! /usr/bin/perl
+################################################################################
+## task - a command line task list manager.
+##
+## Copyright 2006 - 2009, Paul Beckingham.
+## All rights reserved.
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 2 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+## FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, write to the
+##
+##     Free Software Foundation, Inc.,
+##     51 Franklin Street, Fifth Floor,
+##     Boston, MA
+##     02110-1301
+##     USA
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 5;
+
+# Create the rc file.
+if (open my $fh, '>', 'hang.rc')
+{
+  print $fh "data.location=.\n",
+            "shadow.file=shadow.txt\n",
+            "shadow.command=list\n";
+  close $fh;
+  ok (-r 'hang.rc', 'Created hang.rc');
+}
+
+=pod
+I found a bug in the current version of task. Using recur and a shadow file will
+lead to an infinite loop. To reproduce it, define a shadow file in the .taskrc,
+set a command for it that rebuilds the database, e.g. "list", and then add a
+task with a recurrence set, e.g. "task add due:today recur:1d infinite loop".
+Task will then loop forever and add the same recurring task until it runs out of
+memory. So I checked the source and I believe I found the cause.
+handleRecurrence() in task.cpp will modify the mask, but writes it only after it
+has added all new tasks. Adding the task will, however, invoke onChangeCallback,
+which starts the same process all over again.
+=cut
+
+eval
+{
+  $SIG{'ALRM'} = sub {die "alarm\n"};
+  alarm 10;
+  my $output = qx{../task rc:hang.rc list;
+                  ../task rc:hang.rc add due:today recur:1d infinite loop;
+                  ../task rc:hang.rc info 1};
+  alarm 0;
+
+  like ($output, qr/^Description\s+infinite loop\n/m, 'no hang');
+};
+
+if ($@ eq "alarm\n")
+{
+  fail ('task hang on add or recurring task, with shadow file, for 10s');
+}
+
+# Cleanup.
+unlink 'shadow.txt';
+ok (!-r 'shadow.txt', 'Removed shadow.txt');
+
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+unlink 'hang.rc';
+ok (!-r 'hang.rc', 'Removed hang.rc');
+
+exit 0;
+
diff --git a/src/tests/bug_period.t b/src/tests/bug_period.t
new file mode 100755
index 000000000..dff6888ff
--- /dev/null
+++ b/src/tests/bug_period.t
@@ -0,0 +1,164 @@
+#! /usr/bin/perl
+################################################################################
+## task - a command line task list manager.
+##
+## Copyright 2006 - 2009, Paul Beckingham.
+## All rights reserved.
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 2 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+## FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, write to the
+##
+##     Free Software Foundation, Inc.,
+##     51 Franklin Street, Fifth Floor,
+##     Boston, MA
+##     02110-1301
+##     USA
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 41;
+
+# Create the rc file.
+if (open my $fh, '>', 'period.rc')
+{
+  print $fh "data.location=.\n";
+  close $fh;
+  ok (-r 'period.rc', 'Created period.rc');
+}
+
+=pod
+http://github.com/pbeckingham/task/blob/857f813a24f7ce15fea9f2c28aadad84cb5c8847/src/task.cpp
+619  // If the period is an 'easy' one, add it to current, and we're done.
+620  int days = convertDuration (period);
+
+Date getNextRecurrence (Date& current, std::string& period)
+
+starting at line 509 special cases several possibilities for period, '\d\s?m'
+'monthly', 'quarterly', 'semiannual', 'bimonthly', 'biannual', 'biyearly'.
+Everything else falls through with period being passed to convertDuration.
+convertDuration doesn't know about 'daily' though so it seems to be returning 0.
+
+Confirmed:
+  getNextRecurrence  convertDuration
+  -----------------  ---------------
+                     daily
+                     day
+                     weekly
+                     sennight
+                     biweekly
+                     fortnight
+  monthly            monthly
+  quarterly          quarterly
+  semiannual         semiannual
+  bimonthly          bimonthly
+  biannual           biannual
+  biyearly           biyearly
+                     annual
+                     yearly
+  *m                 *m
+  *q                 *q
+                     *d
+                     *w
+                     *y
+=cut
+
+my $output = qx{../task rc:period.rc add daily due:tomorrow recur:daily};
+like ($output, qr/^$/, 'recur:daily');
+
+$output = qx{../task rc:period.rc add day due:tomorrow recur:day};
+like ($output, qr/^$/, 'recur:day');
+
+$output = qx{../task rc:period.rc add weekly due:tomorrow recur:weekly};
+like ($output, qr/^$/, 'recur:weekly');
+
+$output = qx{../task rc:period.rc add sennight due:tomorrow recur:sennight};
+like ($output, qr/^$/, 'recur:sennight');
+
+$output = qx{../task rc:period.rc add biweekly due:tomorrow recur:biweekly};
+like ($output, qr/^$/, 'recur:biweekly');
+
+$output = qx{../task rc:period.rc add fortnight due:tomorrow recur:fortnight};
+like ($output, qr/^$/, 'recur:fortnight');
+
+$output = qx{../task rc:period.rc add monthly due:tomorrow recur:monthly};
+like ($output, qr/^$/, 'recur:monthly');
+
+$output = qx{../task rc:period.rc add quarterly due:tomorrow recur:quarterly};
+like ($output, qr/^$/, 'recur:quarterly');
+
+$output = qx{../task rc:period.rc add semiannual due:tomorrow recur:semiannual};
+like ($output, qr/^$/, 'recur:semiannual');
+
+$output = qx{../task rc:period.rc add bimonthly due:tomorrow recur:bimonthly};
+like ($output, qr/^$/, 'recur:bimonthly');
+
+$output = qx{../task rc:period.rc add biannual due:tomorrow recur:biannual};
+like ($output, qr/^$/, 'recur:biannual');
+
+$output = qx{../task rc:period.rc add biyearly due:tomorrow recur:biyearly};
+like ($output, qr/^$/, 'recur:biyearly');
+
+$output = qx{../task rc:period.rc add annual due:tomorrow recur:annual};
+like ($output, qr/^$/, 'recur:annual');
+
+$output = qx{../task rc:period.rc add yearly due:tomorrow recur:yearly};
+like ($output, qr/^$/, 'recur:yearly');
+
+$output = qx{../task rc:period.rc add 2d due:tomorrow recur:2d};
+like ($output, qr/^$/, 'recur:2m');
+
+$output = qx{../task rc:period.rc add 2w due:tomorrow recur:2w};
+like ($output, qr/^$/, 'recur:2q');
+
+$output = qx{../task rc:period.rc add 2m due:tomorrow recur:2m};
+like ($output, qr/^$/, 'recur:2d');
+
+$output = qx{../task rc:period.rc add 2q due:tomorrow recur:2q};
+like ($output, qr/^$/, 'recur:2w');
+
+$output = qx{../task rc:period.rc add 2y due:tomorrow recur:2y};
+like ($output, qr/^$/, 'recur:2y');
+
+# Verify that the recurring task instances get created.  One of each.
+$output = qx{../task rc:period.rc list};
+like ($output, qr/\bdaily\b/,      'verify daily');
+like ($output, qr/\bday\b/,        'verify day');
+like ($output, qr/\bweekly\b/,     'verify weekly');
+like ($output, qr/\bsennight\b/,   'verify sennight');
+like ($output, qr/\bbiweekly\b/,   'verify biweekly');
+like ($output, qr/\bfortnight\b/,  'verify fortnight');
+like ($output, qr/\bmonthly\b/,    'verify monthly');
+like ($output, qr/\bquarterly\b/,  'verify quarterly');
+like ($output, qr/\bsemiannual\b/, 'verify semiannual');
+like ($output, qr/\bbimonthly\b/,  'verify bimonthly');
+like ($output, qr/\bbiannual\b/,   'verify biannual');
+like ($output, qr/\bbiyearly\b/,   'verify biyearly');
+like ($output, qr/\bannual\b/,     'verify annual');
+like ($output, qr/\byearly\b/,     'verify yearly');
+like ($output, qr/\b2d\b/,         'verify 2d');
+like ($output, qr/\b2w\b/,         'verify 2w');
+like ($output, qr/\b2m\b/,         'verify 2m');
+like ($output, qr/\b2q\b/,         'verify 2q');
+like ($output, qr/\b2y\b/,         'verify 2y');
+
+# Cleanup.
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+unlink 'period.rc';
+ok (!-r 'period.rc', 'Removed period.rc');
+
+exit 0;
+
diff --git a/src/tests/bug_sort.t b/src/tests/bug_sort.t
index 4b9c4973a..0d0d49eac 100755
--- a/src/tests/bug_sort.t
+++ b/src/tests/bug_sort.t
@@ -53,7 +53,7 @@ like ($output, qr/three.*one.*two/msi, 'list did not hang after pri:H on 1');
 
 # Cleanup.
 unlink 'pending.data';
-ok (!-r 'pendind.data', 'Removed pending.data');
+ok (!-r 'pending.data', 'Removed pending.data');
 
 unlink 'bug_sort.rc';
 ok (!-r 'bug_sort.rc', 'Removed bug_sort.rc');
diff --git a/src/tests/nag.t b/src/tests/nag.t
index d9dc94d76..d55aac456 100755
--- a/src/tests/nag.t
+++ b/src/tests/nag.t
@@ -56,7 +56,7 @@ ok (qx{../task rc:nag.rc do 1} !~ qr/NAG/, 'do due:yesterday -> no nag');
 
 # Cleanup.
 unlink 'pending.data';
-ok (!-r 'pendind.data', 'Removed pending.data');
+ok (!-r 'pending.data', 'Removed pending.data');
 
 unlink 'nag.rc';
 ok (!-r 'nag.rc', 'Removed nag.rc');
diff --git a/src/tests/tag.t b/src/tests/tag.t
index ceeb24dea..f55ba0dbf 100755
--- a/src/tests/tag.t
+++ b/src/tests/tag.t
@@ -40,7 +40,6 @@ if (open my $fh, '>', 'tag.rc')
 
 # Add task with tags.
 my $output = qx{../task rc:tag.rc add +1 This +2 is a test +3; ../task rc:tag.rc info 1};
-#like ($output, qr/^Tags\s+1 2 3$/ms, 'tags found');
 like ($output, qr/^Tags\s+1 2 3\n/m, 'tags found');
 
 # Remove tags.
@@ -65,7 +64,7 @@ unlike ($output, qr/^Tags/m, '-missing NOP');
 
 # Cleanup.
 unlink 'pending.data';
-ok (!-r 'pendind.data', 'Removed pending.data');
+ok (!-r 'pending.data', 'Removed pending.data');
 
 unlink 'tag.rc';
 ok (!-r 'tag.rc', 'Removed tag.rc');