When I open iPhoto some of the pictures are missing. There is a square where the picture should be. when I double click it opens with a black square and ! in the middle. I think this happened at the last update which is 8.1.2. My computer information is below. Anyone else have this problem in the past? Al Grappone (89) USN Ret 20" iMac OS X 10.5.8 2. 1 GHz ,PPCG5. 1GB DDFR2 SDram memory, Mail 3.6, iTunes9.2 iLife9 Quicken2007 16.0.0, Epson Perfection 2450 Photo Scanner, Canon iP5200 Photo Printer,Netgear Wireless-N router