Comment 1 for bug 485498

{see picture}
I checked the box of "ToDo Uni". When the count-down finished it created an empty task from nowhere, and when I tried to cancel it I had this:

anabelli@sheldon:~$ tasque
[Debug]: Tasque remote control active.
[Debug]: Found Available Backend: Tasque.Backends.RtmBackend.RtmBackend
[Debug]: Found Available Backend: Tasque.Backends.Sqlite.SqliteBackend
[Debug]: Found Available Backend: Tasque.Backends.EDS.EDSBackend
[Debug]: Tasque.exe location: /usr/lib/tasque/Tasque.exe
[Info]: Searching for Backend DLLs in: /usr/lib/tasque
[Info]: Reading /usr/lib/tasque/RtmNet.dll
[Debug]: Storing 'Tasque.Backends.RtmBackend.RtmBackend' = 'Remember the Milk'
[Debug]: Storing 'Tasque.Backends.Sqlite.SqliteBackend' = 'Local File'
[Debug]: Storing 'Tasque.Backends.EDS.EDSBackend' = 'Evolution Data Server'
[Debug]: CurrentBackend specified in Preferences: Tasque.Backends.RtmBackend.RtmBackend
[Info]: Using backend: Remember the Milk (Tasque.Backends.RtmBackend.RtmBackend)
[Debug]: Found AuthToken, checking credentials...
[Debug]: RTM Auth Token is valid!
[Debug]: Setting configured status to true
[Debug]: ThreadState: Unstarted
[Debug]: Configuration status: True
[Debug]: RtmBackend.UpdateCategories was called
[Debug]: RtmBackend.UpdateCategories is done
[Debug]: RtmBackend.UpdateTasks was called
[Debug]: RtmBackend.UpdateTasks is done
[Debug]: Backend sync finished
[Debug]: Backend sync finished
[Debug]: OnTaskToggled
[Debug]: Timeout Canceled for task: ToDo Uni
[Debug]: Inactivating Task: ToDo Uni
[Debug]: Read timeout from prefs: 5
[Debug]: Completing Task: ToDo Uni
[Debug]: OnTaskToggled
[Debug]: Timeout Canceled for task: ToDo Uni
[Debug]: Activating Task: ToDo Uni
[Debug]: OnTaskToggled
[Debug]: Timeout Canceled for task: ToDo Uni
[Debug]: Inactivating Task: ToDo Uni
[Debug]: Read timeout from prefs: 5
[Debug]: Completing Task: ToDo Uni
[Debug]: Unable to delete task:
[Debug]: System.NullReferenceException: Object reference not set to an instance of an object
  at Tasque.Backends.RtmBackend.RtmBackend.DeleteTask (ITask task) [0x00000]