This bug reappears in karmic koala with activated apparmor. I got following audit in dmesg output:
[46602.593528] type=1503 audit(1257172147.707:257): operation="truncate" info="Failed name lookup - deleted entry" error=-2 pid=8394 parent=8393 profile="/usr/share/gdm/guest-session/Xsession" requested_mask="w::" denied_mask="w::" fsuid=118 ouid=118 name=2F746D702F67756573742D686F6D652E456C625242522F2E657865636F6F6F4A5A736B3159202864656C6574656429
This bug reappears in karmic koala with activated apparmor. I got following audit in dmesg output: 7.707:257) : operation= "truncate" info="Failed name lookup - deleted entry" error=-2 pid=8394 parent=8393 profile= "/usr/share/ gdm/guest- session/ Xsession" requested_ mask="w: :" denied_mask="w::" fsuid=118 ouid=118 name=2F746D702F 67756573742D686 F6D652E456C6252 42522F2E6578656 36F6F6F4A5A736B 3159202864656C6 574656429
[46602.593528] type=1503 audit(125717214