I have not gotten GroupCal 3.15 to succesfully sync once! I have tried about 20 times now...

Here's a SHORT LIST of the many problems:

1 - Event sync stalls - whether at 20 items or 200 - stalls and doesn't recover.

2 - When it does finish (after a force quit and restart), it never writes any events to iCal, EVER

3 - Re-reading calendars in GroupCal sometimes deletes all iCal calendars.

I appreciate that they're putting out new versions, it's just that not a single one has worked for me, not once.