It's great that Lion allows different spaces to have different wallpapers, but I have not found an easy way to get them all to use the same wallpaper. The only way I've accomplished it so far is to either manually change the wallpaper for each space or to close all of the spaces (except the one that has the wallpaper I want) and reopen them. Anybody have a solution to allow me to quickly set all spaces to the same wallpaper?