It's been like this for awhile. I go "Right Click, Properties" and choose the wallpaper I want, and hit apply or ok, doesn't change. So for awhile, I had to either do it from explorer, right click use as background, or same way within my browser. Now, for no reason, right clicking on a wallpaper in explorer don't work either. Both of these just stopped working by themselves, nothing has changed. *edit, here is something funny, alright I tried applying more wallpapers, and it seems it wont work with wallpapers smaller then my native resolution, anything that is my native resolution or larger works.. WTF?