I did a search for this and I can't find anything to help me. When I opened iPhoto to upload a new photo it asked me if I wanted to upgrade the thumbnails. I hit "later." My new photo uploaded just fine. When I went back to look ALL my other photos are GONE. I am freaking out right now. So many pictures from my daughters first 2 years of life were in there. Well, I can find some pictures by typing in the folder names that I had labeled in iPhoto. I can only view them in preview and nothing else. I've also done the rebuild by opening with option + command. How can I fix this? Please tell me my photos aren't completely gone!