Recently, after my '11 iMac has stopped skimming photos in events and faces. I've tried rebuilding the library, but it stops at 65% and I've also tried re-installing iPhoto. Nothing has worked. I even tried using another unused account but that didn't work either, which maybe means it is iPhoto at fault not my iPhoto Library? Or have I somehow turned skimming off in some obscure setting somewhere? I'm running Lion and using a magic trackpad, but shave tried a mouse too. Any help would be apreciated.