I was backing up files yesterday when i noticed one of my pictures appeared several times in many of my iphoto library folders (in the picture folder in the home folder in Macintosh HD), and there were also new folders under their own dates full of the same picture - mostly named "data". I didn't want to back these up, so i deleted them... I still have all (i think) my photos in these folders, but when i open iphoto it is empty - just says "no photos". However, there are now numerous (hundreds even thousands) of blank photos peppered or swamping my iphoto library folders. Does this sound like a 'virus' of some sort. I know macs are robust, but what else would explain this? Any advice on how i might get out of this would be much appreciated. As you might have guessed, I'm not that computer literate. Thanks alot.