> I added *.d pattern and *.o already exists, when i do a compare on a folder 
> that contains these types of files, the comparsion of these files is done in 
> the Team foundation server.

Some more info:
It doesn't compare ignored resources when done on a project that is version controlled from the project explorer but the
 compare on the Source control does compare on ignored resources. Could be that is how it should be.