> I have the same problem with 5 Google calendars being refreshed. They
> seem to refresh every 10 minutes or so. During that time, Thunderbird
> is not responsive. This is starting to drive me crazy also. Any help
> much appreciated!
your problem might be related to this thread a couple of days ago:
Have a look further down for this post:
"Another usual suspect for such a cyclic CPU consumption is the
invitation lookup routine that can regularly. You may try to disable
it.
To disable it, edit the configuration (Options/Advanced/Edit config),
look for "calendar.invitations.autorefresh.enabled" and set it to
"false". "
Regards
Ruediger