Comment 4 for bug 771391

Consistently, each time this bug has cropped up for me, I am able to unlock the screen and stop the screensaver, yet...

Once back at the desktop, the unity dock and global menu flicker continuously and the panel casts a large black shadow over any application's file menu labels.

To rectify the situation, I need to restart compiz. Is the behavior I've described consistent with this bug? Or, should I file a separate bug against unity or compiz?