Comment 11 for bug 737792

In my case, I did the following:

- download/install VirtualBox 4.0.4 from http://www.virtualbox.org/wiki/Downloads
- download BETA 1 image of Ubuntu 11.04
- create VirtualBox virtual machine with 3D Acceleration enabled
- install Ubuntu 11.04 BETA 1 in VirtualBox; reboot virtual machine
- update all packages in Ubuntu via the usual "sudo apt-get update ; sudo apt-get upgrade"
- install VirtuaBox utils via "sudo apt-get install virtualbox-ose-guest-utils"; reboot virtual machine
- ensure that "Ubuntu" is chosen as the desktop environment, log-in
- wait while system stalls and I finally receive the Compiz error message (sometimes immediately, sometimes a short time later)