It appears that the "Enable delegation for Apple iCal CalDAV client" feature is broken in 7.1.4.
Have a strange problem after upgrading to 7.1.4 on Ubuntu 10.04LTS. All my Mac iCal users have lost the ability to see shared Zimbra calendars in iCal. The shares are also not visible in the iPhone either. They can see them in the Desktop clients and online but not in iCal or iPhone. We have found a workaround by using the iCal "subscribe" feature and pasting in the URLs, but it is nowhere near as good.
They are bitching, but I see no log-related errors or any other kind of indications that there are any problems. Where should I look to try to diagnose this mystery?