Public bug reported:

When clicking on the Settings button in Virtualbox, system freezes instead of 
opening the Settings window.  I see a lot of debug lines on the terminal where 
I started the gnome-shell ... and by commenting in 
/usr/share/gnome-shell/js/ui/windowManager.js: the following line:
        let [success, source, length] = GLib.file_get_contents(global.datadir + 
'/shaders/dim-window.glsl');
it solves the problem.
Lines on the terminal window:

    JS ERROR: !!!   Exception in callback for signal: prepare-frame
    JS ERROR: !!!     message = 'FIXME: Only supporting zero-terminated ARRAYs'
    JS ERROR: !!!     lineNumber = '0'
    JS ERROR: !!!     fileName = 'gjs_throw'
    JS ERROR: !!!     stack = '("FIXME: Only supporting zero-terminated 
ARRAYs")@gjs_throw:0
getDimShader()@/usr/share/gnome-shell/js/ui/windowManager.js:26
(1)@/usr/share/gnome-shell/js/ui/windowManager.js:52
_updateTweenByIndex(0)@/usr/share/gjs-1.0/tweener/tweener.js:316
_updateTweens()@/usr/share/gjs-1.0/tweener/tweener.js:344
_onEnterFrame([object Object])@/usr/share/gjs-1.0/tweener/tweener.js:359
_emit("prepare-frame")@/usr/share/gjs-1.0/signals.js:124
(2934)@/usr/share/gnome-shell/js/ui/tweener.js:244
([object 
_private_Clutter_Timeline],2934)@/usr/share/gnome-shell/js/ui/tweener.js:220
([object _private_Clutter_Timeline],2934)@/usr/share/gjs-1.0/lang.js:110
'

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-shell 3.0.2-1svn2 [modified: 
usr/share/gnome-shell/js/ui/placeDisplay.js 
usr/share/gnome-shell/js/ui/status/bluetooth.js 
usr/share/gnome-shell/js/ui/statusIconDispatcher.js 
usr/share/gnome-shell/js/ui/windowManager.js]
Uname: Linux 3.0.0-rc6 i686
NonfreeKernelModules: wl
Architecture: i386
Date: Thu Jul  7 19:27:27 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to oneiric on 2011-07-04 (3 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 oneiric unity-2d

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https://bugs.launchpad.net/bugs/807285

Title:
  When clicking on the Settings button in Virtualbox, system freezes ...

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