hamster-time-tracker crashed with TypeError: can't compare datetime.datetime to NoneType

I was fooling around on precise with hamster 2.91.3+git20110714.9aefd7-2ubuntu2

I started and stopped a few tasks, then edited one, dragging the graphical extent to make it start earlier, as I recall. I might have done other stuff too. Then it crashed and offered to send in a bug report, so I said yes. Here it is. This was in the terminal window where I started it.

/usr/lib/python2.7/dist-packages/hamster/configuration.py:153: GtkWarning: IA__gtk_accel_label_set_accel_closure: assertion `gtk_accel_group_from_accel_closure (accel_closure) != NULL' failed
  ui.add_from_file(os.path.join(runtime.data_dir, name))
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/hamster/widgets/dayline.py", line 186, in on_click
    if start_time > dt.datetime.now():
TypeError: can't compare datetime.datetime to NoneType

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: hamster-applet 2.91.3+git20110714.9aefd7-2ubuntu2
Uname: Linux 3.1.0-030100-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Fri Feb 3 15:46:07 2012
ExecutablePath: /usr/bin/hamster-time-tracker
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: python /usr/bin/hamster-time-tracker
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/hamster-time-tracker']
SourcePackage: hamster-applet
Title: hamster-time-tracker crashed with TypeError in on_click(): can't compare datetime.datetime to NoneType
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/hamster/widgets/dayline.py", line 186, in on_click
     if start_time > dt.datetime.now():
 TypeError: can't compare datetime.datetime to NoneType
UpgradeStatus: Upgraded to precise on 2012-01-29 (5 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare