HT1338: OS X: Updating OS X and Mac App Store appsLearn about OS X: Updating OS X and Mac App Store apps
Currently Being ModeratedMay 7, 2012 8:49 PM (in response to kyrab35)
You can right click and "Show package contents" on the iPhoto Library and open your Originals folder and remove problematic files, or copy and remove the good ones.
Perhaps both or some of each in your case.
You don't want to zip up the iPhoto Library, perhaps it made a copy when it zipped, it needs to stay unzipped.
Zipping is compression for transfer use mostly.