My daughter's MacBook Pro has a problem with iPhoto. Just get a spinning wheel after opening. I've tried deleting and reloading from time capsule backups when it did work. That didnt work. Anyone have any ideas?
I advise that you try creating a new iPhoto library by following the instructions on this Apple Support page.
In case the above answers do not work or if you want to try something a little easier first, try moving the iPhoto plist file to the Desktop.
You can find it in
~/Library/Preferences. It should have the name
com.apple.iPhoto.plist. If you are running Lion, you will need to move the
com.apple.iPhoto.plist.lockfile file as well. Try moving these to the Desktop and reopening the application. If that does not resolve the issue, put the
plist files back and move on to the other suggestions.