I don't know if is related, but I apreciate similar problem.
Running debian wheezy amd64 as VirtualBox guest on Windows 7 64 as host,
with 3d aceleration enabled.
When I view this site
http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/ the view
zone flicker showing background desktop and minimize window not hide the
page view. In this site http://ricostacruz.com/jquery.transit/ after scroll
and intereract with the page corrupt the view. When navigate to another
site using this tab all gnome shell corrupt and reboot the system and init
a new gnome session show a gnome session corrupted. If I halt the virtual
machine and turn on the problem dissapear until the steps described.
If I disable 3d aceleration in virtual machine, gnome run in fallback mode
and the problem not occur.
The problem is the same using Google Chrome installed from google site.
