I have just had the same problem, following the same processes as usual, and the images that are not scanning thru ok change each time i load pm. sometimes the thumbnails come up and when i open the image it briefly shows before displaying the black screen/'unable to render image' message. this is the first time this has happened. i'm on a new vista os toshiba satellite laptop, has been working ok prior to this. photos are from a week ago, had been ingested successfully and are full size etc.