http://www.macnn.com/articles/11/05/11/merged.events.now.stay.merged.after.sync/
Apple updates iPhoto to 9.1.3, fixes splitting issue
updated 08:35 pm EDT, Wed May 11, 2011
Merged events now stay merged after sync
Apple today released a minor update to iPhoto, now at version 9.1.3, to correct an issue where merged events would spontaneously be split back into separate events when synched with an iOS device. The update is 106.29MB in size and is recommended for all iPhoto and iLife '11 users. It is now available either directly from Apple's Support Downloads area or through Software Update. It requires Mac OS X 10.6.6 or later.
