jockey-gtk crashed with DBusException in call_blocking() after trying to enable compiz

[apfrod]

got this crash after a reboot
had to force shutdown after a freeze when trying to enable visual effects from the Appearance menu

8.10 alpha 6 on Dell inspiron 2600

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 8.10
ExecutablePath: /usr/bin/jockey-gtk
InterpreterPath: /usr/bin/python2.5
Package: jockey-gtk 0.5~alpha1-0ubuntu2
PackageArchitecture: all
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/bin/jockey-gtk --check 60
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/jockey-gtk', '--check', '60']
SourcePackage: jockey
Title: jockey-gtk crashed with DBusException in call_blocking()
Uname: Linux 2.6.27-3-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video