* Updated greybird to latest git (135856b) to get more bugfixes. * usr/share/xfce4/backdrops: - xubuntu-bluebird-ws.png: dropped, wasn't used and takes space. - xubuntu-greybird.png: added, new default wallpaper for natty. * var/lib/gdm/.gconf.defaults/%gconf-tree.xml: set the new wallpaper by default.