Calendar crashes opening iCloud-sync'd events
I receive many invites from co-workers who use Outlook / Exchange to create appointments. I receive the appointment, accept and add it to iCal on my MacBook Pro (10.7.3) just fine. I sync my calendars to my iPhone and iPad via iCloud.I can open the appointment and view it on the MacBook and via the web-iCloud interface, but if I try to view it on my iPhone or iPad, the Cal app will crash immediately. It happens with 100% of the accepted invites on both iOS devices. I've rebooted the devices to no avail.
Any alarms associated with the appointment work on the iOS devices, but I just can't view the appointment. Manually created appointments have no problems.
Suggestions?
MacBook Pro, Mac OS X (10.7.2)