Currently Being ModeratedJul 20, 2011 4:15 PM (in response to aphiffer)
I just found out that it is only happening to calendars synced with Google calendars. I'm wondering if there is an incompatability problem.
Currently Being ModeratedJul 20, 2011 5:01 PM (in response to aphiffer)
I just found the answer in another thread. It was a setting in Google notifications that was resetting my ical alerts. In case you have the same problem, the link is:
Currently Being ModeratedJun 7, 2013 2:46 PM (in response to aphiffer)
that's it! that feature's been driving us nuts for weeks! Spitting and cursing about Apple Mail when it was Google doing it all along.
BTW, there's another problem which makes it impossible to delete the spurious alerts (unless you know what the problem is) - synching only happens if the title or date/time of an event changes. Otherwise edits are ignored.
https://support.google.com/calendar/known-issues/15494?hl=en - the last item "Changes made only to reminders are not synced"...