Does anybody know if it is possible to add several changing backgrounds in Ubuntu 11.10? I've tried to add more background-1.xml-files according to the directory layout as given for the Contest wallpaper, but it does not get recognized in the appearance window, aka the window to set the wallpaper. It looks like this was possible in 11.04 where you could add another xml-file to the selection, but this possibility seems to have been removed in 11.10.