When I update (install) iPhoto (9.4.1 now) from App Store and open iPhoto it says Needs to Update Library but just hangs (cant even hit the OK or Cancel buttons). I have left it running for hours and Activity Monitor reports it as Not Responding before having to Force Quit. Have also tried deleting my library/moving iPhoto to Trash and installing from scratch (and ever combination I can think of). It still hangs when I try to start iPhoto for the first time. Keep trying on each new release with same results (have tried dozens of times). Have sent a report to Apple ever time too. I want to enable Shared iPhoto Streams but cant update from iPhoto 9.3.2.