There are a few different bug filings for this problem. From reading through them, it may be related to nVidia, as the only reported video cards have been nVidia. I have an nVidia 8600 with the proprietary driver and a dual display setup, and I'm running 64 bit Ubuntu.
Switching between virtual desktops seems to get rid of the shadow easily. -- GKSudo dialogue leaves drop shadow even when closed https://bugs.launchpad.net/bugs/219477 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
