I have had my C2D 15" MBP for about 5 months. iPhoto has worked great until now. When I try to make a slideshow from an album it will only use one or two photos instead of the whole album. Also alot of my picture will come up as a grey square with an exclamation point it the middle. I dont think I have changed any settings but cannot figure this out. If I make a slideshow in iDVD it works fine, but not in iPhoto.