applet quit.py crashed with DBusException in call_blocking()

I tried to logout and it crashed halfway there, so I'm not quite sure it is the applet's fault. By halfway there I mean the system started to logout (compiz, nautilus had been already closed) but it failed and I had to restart the xserver (alt+prtscrn+k) to get out.

I'm using Lucid beta 2 and awn from its repos (updated 2 hours ago).

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: awn-applets-python-core 0.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
Architecture: i386
Date: Sat Apr 17 19:06:47 2010
ExecutablePath: /usr/share/avant-window-navigator/applets/quit/quit.py
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: python /usr/share/avant-window-navigator/applets/quit/quit.py --uid=1271520259 --window=18920933 --panel-id=1
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/avant-window-navigator/applets/quit/quit.py', '--uid=1271520259', '--window=18920933', '--panel-id=1']
SourcePackage: awn-extras-applets
Title: quit.py crashed with DBusException in call_blocking()
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

Traceback (most recent call last):
  File "/usr/share/avant-window-navigator/applets/quit/quit.py", line 258, in apply_action_cb
    self.execute_action(action)
  File "/usr/share/avant-window-navigator/applets/quit/quit.py", line 267, in execute_action
    self.log_out_cb()
  File "/usr/share/avant-window-navigator/applets/quit/quit.py", line 286, in gnome_log_out
    self.sm_if.Logout(0)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.Error.Disconnected: Connection was disconnected before a reply was received