Gnome-Shell won't start - GnomeBluetoothApplet.KillswitchState is undefined

Starting today, I've become unable to log into my the Gnome3 session. Upon starting I get nothing but my wallpaper, no windows, no desktop.... nothing. When I stared a recovery session I tried to manually start gnome-shell and this is what I got:

ripps@ripps-desktop:~$ gnome-shell --replace

(gnome-terminal:31422): Gdk-CRITICAL **: gdk_error_trap_pop_internal: assertion `trap != NULL' failed
      JS LOG: Error: Requiring IBus, version none: Typelib file for namespace 'IBus' (any version) not found
    JS ERROR: !!! Exception was: TypeError: GnomeBluetoothApplet.KillswitchState is undefined
    JS ERROR: !!! message = '"GnomeBluetoothApplet.KillswitchState is undefined"'
    JS ERROR: !!! fileName = '"/usr/share/gnome-shell/js/ui/status/bluetooth.js"'
    JS ERROR: !!! lineNumber = '97'
    JS ERROR: !!! stack = '"()@/usr/share/gnome-shell/js/ui/status/bluetooth.js:97
wrapper()@/usr/share/gjs-1.0/lang.js:204
()@/usr/share/gnome-shell/js/ui/status/bluetooth.js:56
wrapper()@/usr/share/gjs-1.0/lang.js:204
()@/usr/share/gjs-1.0/lang.js:145
()@/usr/share/gjs-1.0/lang.js:239
()@/usr/share/gnome-shell/js/ui/panel.js:1099
wrapper()@/usr/share/gjs-1.0/lang.js:204
start()@/usr/share/gnome-shell/js/ui/main.js:216
@<main>:1
"'
Window manager warning: Log level 32: Execution of main.js threw exception: TypeError: GnomeBluetoothApplet.KillswitchState is undefined

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-shell 3.5.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0
Uname: Linux 3.5.0-8-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.4-0ubuntu6
Architecture: amd64
Date: Thu Aug 9 00:34:14 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to quantal on 2012-01-05 (216 days ago)