Sudden drop to a tty while running Gnome and one of blizzard's Mozilla nightlies (working in Bugzilla, ironically enough.) The dri driver is disabled, due to previous issues (26518). Log is attached.
Created attachment 9484 [details] XFree86 log from crash
Acknowledged, the r128 driver has some "issues" currently.
This defect is considered MUST-FIX for Florence Release-Candidate #2
Disable DRI as it is broken on r128. *** This bug has been marked as a duplicate of 25920 ***