This bug affects me, too.
Unchecking a checkbox in CompizConfig Settings Manager makes the Unity panel disappear. It may turn black or various kinds of things. I've made some screenshots:
http://img691.imageshack.us/img691/984/panelgone1.jpg http://img715.imageshack.us/img715/1350/panelgone2.jpg http://img101.imageshack.us/img101/2972/panelgone3.jpg http://img707.imageshack.us/img707/9295/panelgone4.jpg
Logging out and in again restores the panel.
This bug affects me, too.
Unchecking a checkbox in CompizConfig Settings Manager makes the Unity panel disappear. It may turn black or various kinds of things. I've made some screenshots:
http:// img691. imageshack. us/img691/ 984/panelgone1. jpg img715. imageshack. us/img715/ 1350/panelgone2 .jpg img101. imageshack. us/img101/ 2972/panelgone3 .jpg img707. imageshack. us/img707/ 9295/panelgone4 .jpg
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Logging out and in again restores the panel.