So I tried upgrading today from 09 to 11 via the App Store. It failed miserably. It did not recognize the photo library. So I backed up iPhoto from Time Machine to before the purchase of 11. Goodbye $15. Two months ago, I took my iMac (Al, 2.4GHz, 24", late 2007 model) to the Apple Store for repairs. It got a new hard drive and logic board. The Apple Store also upgraded my iLife 08 to iLife 09. I've had problems with iPhoto ever since. I can import photos to it, but the new photos don't show up in my desktop or screen saver, which use my iPhoto library. I really want to go back iPhoto 08. Can this be done from 09? Will I keep my photo library intact?