according to your screenshot (why not posting directly as png...?), you're not using gnome-panel, but unity.
** Package changed: gnome-panel (Ubuntu) => unity (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1006491 Title: ubuntu panel, hiding becomes blurred notifications To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1006491/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs