I have Aperture 2 installed, whenever I go to the Desktop&Screensaver settings-panel to change my wallpaper I get this: I have all my wallpapers sorted in folders in that list when Aperture isn't installed. Whenever I install it I get that error. 2 Aperture library lists, and one of them I can't even "minimize". It just hangs and does nothing. Can someone please help me fix this problem? It's really annoying..