Not sure how this same bug could be happening under metacity, the segfault is shown to happen in compiz rather than gnome-screensaver? Even if gnome-screensaver is triggering it, that says to me it's a compiz bug.
Not sure how this same bug could be happening under metacity, the segfault is shown to happen in compiz rather than gnome-screensaver? Even if gnome-screensaver is triggering it, that says to me it's a compiz bug.