@Xagoln,

With the patches I did (see above on post #602) I don't have any problems synchronizing with Google Calendar (basically, I disabled any reminders being propagated in any direction, which to me makes a lot of sense).

Syncevolution should also be able to synchronize with Google Calendar. I use only for contacts, for now. But my plan is to test it with the calendar as well. Unfortunately my lack of time prevents me from doing this (I want to backup everything first and try to get it right the first time..).

If I manage to do this, I will post here.