In System Preferences, my list of wallpaper folders no longer shows. Just "Apple" and "Aperture Project" and whenever I try to reload my wallpaper folders, it just ads another "Aperture Project" folder into the wallpaper list. Cleaning out the cache for system and user hasn't done squat, nor has deleting the appropriate preference file. No matter what I do it just adds another "Aperture Project" folder that doesn't even have anything in it. I don't even use Aperture, never have. Any suggestions?