Inconsistent synchronization-iCal to iPhone5

Hi, some of our calendars are on a corporate google apps domain. It worked perfect with the iPhone4 and iCal (synching with a Mountain Lion MBA)

But now we upgraded to iPhone5, and immediately some entries in the Google Appscalendar are not appearing on iPhone calendar & vice versa.

Synching iPhone and iCal calendars with a GoogleApps calendar worked seamlessly with the 4s; now with the iPhone 5 there seems to be no communication between the GoogleApps and the iPhone.

Or to put it more specifically: iPhone synchs with iCal via iCloud. (iCloud does not include GoogleApps calendar (never did) and so GoogleApps meetings do not appear on iCloud.) But all GoogleApps events used to appear on iCal and iPhone, labeled as GoogleApps calendar; moreover, the GoogleApps calendar address does appear and exist on both iCal and iPhone calendars, and all previously-scheduled events (history, or recurring, created prior to the use of the iPhone5) do appear also on the iPhone.

* New events created on the GoogleApps calendar appear correctly in the iCal - synch is fine.

* New events created on iCal for the GoogleApps calendar (ie. created as a GoogleApps calendar entry by choosing that calendar from the calendar menu) appear correctly in GoogleApps online calendar - synch is fine.

* New events created on iPhone for the GoogleApps calendar (ie. created as a GoogleApps calendar entry by choosing that calendar from the calendar menu) do NOT appear EITHER on iCal or GoogleApps calendar.

(An aside, or perhaps important: creating an event on any other calendar on iPhone or iCal, default or personal or other choices, all synchs fine between the two. When an event, once created, is changed to the GoogleApps calendar by choosing that calendar, it DISAPPEARS on the other calendar - ie iPhone or iCal. If done on iCal, shows up on GoogleApps calendar. If done on iPhone, remains only on iPhone and disappears from iCal.)

Thanks for any advice offered!

 

Reinstalling..what? ical on the Mac?

Reinstalling..what? ical on the Mac?