[ubuntu] Blank Desktop in Gnome Shell after Upgrade to 12.10

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http://ubuntuforums.org – Unity and Cinnamon Desktops work properly, but Gnome Shell presents me with wallpaper and one of my startup apps with undecorated windows (e.g. no controls and title bar/borders). I can log out using keyboard shortcut (ctrl+alt+del) but can do nothing else but move my mouse around the screen. Things I've tried: 1) completely removing and reinstalling gnome-shell 2) manually removing all remnants of gnome shell configuration files 3) deleting various compiz config files .compiz .config/.compiz-1 .gconf/apps/compizconfig-1 .gconf/apps/compiz-1 None of this works. I was previously running 3. (Hardware)