https://bugs.freedesktop.org/show_bug.cgi?id=36563
--- Comment #1 from Ernst Sjöstrand ernstp@gmail.com 2011-04-26 21:35:31 PDT --- I was in a hurry but I thought it was better with a quick bugreport than no report at all. :-) This was with Ubuntu Natty's 2.6.38 kernel + xorg-edgers 20110422. Can't remember exactly what I did, some window management operation. Hasn't happened since. Attached to compiz with gdb from the console and got the backtrace when this happened.