Version-Release number of selected component:
taskcoach-1.2.6-3.fc17

Additional info:
cmdline:        /usr/bin/python /usr/bin/taskcoach
executable:     /usr/bin/taskcoach
kernel:         3.7.3-101.fc17.x86_64
uid:            1000

Truncated backtrace:
observer.py:136:values:KeyError: None

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/taskcoachlib/gui/dialog/editor.py", line 1175, in ok
    self.okInterior()
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 169, in decorator
    event.send()
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 155, in send
    Publisher().notifyObservers(self)
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 338, in notifyObservers
    observer(event.subEvent(*eventTypesAndSources))
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 188, in __call__
    return self.method(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/taskcoachlib/domain/effort/composite.py", line 160, in onStopTracking
    stoppedEffort = event.value()
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 129, in value
    return self.values(source, type)[0]
  File "/usr/lib/python2.7/site-packages/taskcoachlib/patterns/observer.py", line 136, in values
    source = source or self.__sourcesAndValuesByType[type].keys()[0]
KeyError: None

Local variables in innermost frame:
source: None
self: Event({})
type: None

Potential duplicate: bug 811260