Well make sure you are using Unity 3D and not 2D, if you are using Unity 3D (I can't tell from the screenshot) Then it might be a bug with the VirtualBox 3D virtual graphics adapter and i'll forward it to their bug tracker.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/874093 Title: Print Screen broken with 3D accelerated desktops (Unity 3D) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/874093/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs