I haven't seen this in a long time, but now I'm wondering if it could be a duplicate of bug 611886: some window contents stop being redrawn after an xrandr switch, sometimes. I had that one happen to a newly-added gnome-panel.
I haven't seen this in a long time, but now I'm wondering if it could be a duplicate of bug 611886: some window contents stop being redrawn after an xrandr switch, sometimes. I had that one happen to a newly-added gnome-panel.