Ok so what I did is the following: I formatted my MacBook cause I had a repeating kernel panic. I took a backup of everything but simply with dragging all my files to an external HD, not with time machine or anything like that. I also just copied my iphoto library file from the pictures folder to my external HD. Today, I copied my iPhoto library file back to my macbook and I openend iPhoto and my pictures are there but they're all black thumbnails. Tried rebuilding but nothing worked.. I'm really frustrated.. can anyone help me.?