Comment 5 for bug 1005914

I found some references that 3d acceleration might indeed be a problem when taking screenshots in virtualbox. I do not know if this is a problem with virtualbox or ubuntu, however. It should "just work", however...

https://forums.virtualbox.org/viewtopic.php?f=7&t=32801
http://www.upubuntu.com/2012/03/take-and-edit-screenshots-with.html