I've just installed Gnome Shell and changed the theme and so on; but I can't change the wallpaper.
I'm using the Gnome Control Center to change the wallpaper but it doesn't work even if i use
gconftool and programs like Wallch aren't working either.
On Unity it's the same problem, but on Unity I can change my wallpaper with Compiz wallpaper changer plug-in.
Any ideas how to fix it?
I don't know what program draws the background, but Nautilus isn't. If i know which program it is I can try killing it to use Wallch, but I haven't found any hints which program is used.