I found this option to disable the modification of wallpapers in a configuration profile. So I built a custom CP to test it out and it still allowed me to modify the wallpaper....anyone else played with this before?
It's possible it's sticking the wallpaper in place by periodically sending out a new one. Can you modify the wallpaper, then send it a blank push and inventory update and see what happens?
I think that's how it works with setting device names.