I'm affected, too. I don't believe, this has something to do with drivers (I'm using nvidia-current) but I think, there is a flaw in the lock-mechanism.
Occasionally, my desktop does not just flashes, but reveals the running applications *on top* of the login field (see attached screen shot). I'm strongly confident, this is just another reason, why you can't use Ubuntu in companies (think of a payslip sheet at the accounting). ** Attachment added: "Picture taken from locked screen." https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/390989/+attachment/2675567/+files/information-leakage.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/390989 Title: [SecurityRoadmap] Locked screen shows the desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/390989/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs