I have been using iPhone 3.0.1 with Zimbra 5.0.18 without any problems. All calendars from 2 servers are visible, up to date and I could add new an appointment from the phone.
When I upgraded to 3.1 version, I cannot any more add an appointment to the default calendar (Zimbra Calendar). The default calendar is visible as a calendar, but it it is not visible in the list where you can add an appointment. I can add an appointment to all other calendars I have created,
It this a bug in iPhone 3.1 or what causes this behaviour ?