Comment 7 for bug 717889

Not seen this bug for a while; the machine is currently running Quantal; and I don't remember seeing this bug during the Precise series either; so it's probably worth closing.

Oiv's comment #2 maybe worth trying if anyone ever hits it again but I suspect the Radeon code has moved on a lot in the last year.
Sohel's comment #3 looks like a separate bug (different back trace).