The iPhoto 9.1.3 update with a bug fix is released and recommended for all iPhoto ’11 users which could be grabbed from software update on system or via direct download link integrated below.
iPhoto automatically organizes your photo library and makes editing as easy as clicking your mouse – so you can get the most out of even the biggest collection.
This update addresses issues when publishing photos to a .Mac Web Gallery, improves overall stability, and fixes a number of other minor issues.
iPhoto 9.1.3 Update:
“This update fixes a problem that could cause some events merged in iPhoto to be split back into multiple events on iOS devices after being synced.”