We were seeing the same problems on treo 650 and a wm5 device. We upgraded from 4.5.2 to 4.5.3, did a resync, and the times for existing appointments are now correct. I believe this bug was the culprit:
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In Zimbra Mobile, meetings were encoded in the
time zone of the user and not in the time zone of
the appointment. This has been fixed, and now
meetings should not show a second time zone
in parentheses.
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Cheers,
-Bob |