Are you running The classic gnome session or a Unity session. In case of latter I think bug should be filed against the package "Unity" as the top panel in Unity is "unity-panel" and is different from the classic one.
Also I could not reproduce the bug with Unity-panel in a fresh install of Ubuntu.
Are you running The classic gnome session or a Unity session. In case of latter I think bug should be filed against the package "Unity" as the top panel in Unity is "unity-panel" and is different from the classic one.
Also I could not reproduce the bug with Unity-panel in a fresh install of Ubuntu.