I've viewed some DVD's on my new 2.8GHz iMac and all was well. I just tried to look as some pictures that my father burned onto a Memorex CD-R disk with his PC and it seemed like the drive didn't recognize the disk. I tried a couple times but it just repeated a noise maybe a half dozen times, then ejected the disk. The noise is a familiar noise that usually only happens once when a drive is starting to read a disk. I checked and the disk works fine on my old Dell laptop. Does a windows machine somehow burn the data differently? That would surprise me. Any ideas what might be wrong? Thanks!