Most of the time I can sync with Outlook (2003) with no problems. But every now and then, I gett the following errors, and calendar sync fails (everything but the calendar syncs fine):

OLERR:0D-0034
OLERR:0D-0026
OLERR:0D-0006
OLERR:0D-0004
OLERR:0D-0001
-Fast Sync
Outlook Calendar synchronization failed

OLERR:15-0002
OLERR:06-0001

If I re-sync after this occurs, I end up with all the calendar entries that I created in Outlook duplicated.

Hotsync is set to "Synchronize the files", and "Handheld Wins" when there are conflicts.

Any ideas?