Description of problem:
Without evolution-sharp installed, tasque loads but displays an empty backend selection list.  The console shows the following debug when launched:

$ tasque 
[Debug]: Tasque remote control active.

** (Tasque:13036): WARNING **: The following assembly referenced from /usr/lib64/tasque/Tasque.exe could not be loaded:
     Assembly:   evolution-sharp    (assemblyref_index=14)
     Version:    5.0.0.0
     Public Key: c46a23b774189844
The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (/usr/lib64/tasque/).


** (Tasque:13036): WARNING **: Could not load file or assembly 'evolution-sharp, Version=5.0.0.0, Culture=neutral, PublicKeyToken=c46a23b774189844' or one of its dependencies.

** (Tasque:13036): WARNING **: Could not load file or assembly 'evolution-sharp, Version=5.0.0.0, Culture=neutral, PublicKeyToken=c46a23b774189844' or one of its dependencies.
[Warn]: Exception reading types from assembly 'Tasque, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null': The classes in the module cannot be loaded.
[Debug]: Tasque.exe location:  /usr/lib64/tasque/Tasque.exe
[Info]: Searching for Backend DLLs in: /usr/lib64/tasque
[Info]: 	Reading /usr/lib64/tasque/RtmNet.dll
[Debug]: CurrentBackend specified in Preferences: 
[Info]: OnPreferences called
[Debug]: Loading preferences
[Debug]: Called Preferences Init
   

[Info]: OnQuit called - terminating application


Version-Release number of selected component (if applicable):
$ rpm -q tasque evolution-sharp
tasque-0.1.9-2.fc12.x86_64
evolution-sharp-0.21.1-5.fc12.x86_64