My co-worker has a laptop running Vista Business . Up until today, everything has been working fine. Today, however, a problem crept up. I'm wondering if anyone else has seen this little bug in Windows Vista. He has multiple folders of pictures, but when he goes to view them, he does not see the thumbnails, nor can he set one of the pictures as his desktop background. He has tried deleting his thumbnail cache, with no luck. Any ideas from the crowd?