We just updated Zimbra to the latest version 5.0.15 and installed the included iSync connector (Can't get to that machine to check the version number right now... 5.0.2428 or something like that?)
Anyway, the new iSync connector now only allows CalDAV syncing. That's all well and good for iCal, but MobileMe doesn't support CalDAV syncing! I can't find a fix to this problem, and I feel like I'm in crazy town seeing this giant oversight! I know CalDAV support is coming to the iPhone in OS 3.0, but we need the calendars to sync now. Any suggestions?
To recap: Mac running Leopard and Zimbra iSync Connector connected to Zimbra 5.0.15 and MobileMe.