bzr-notify crashed with DBusException in __new__()

Binary package hint: bzr-gtk

root@thomas-laptop:/home/thomas# lsb_release -rd ; uname -a ; apt-cache policy linux bzr bzr-notify bzr-gtk
Description: Ubuntu jaunty (development branch)
Release: 9.04
Linux thomas-laptop 2.6.28-00004-g7d55917-dirty #1 SMP Thu Jan 8 08:07:10 GMT 2009 i686 GNU/Linux
linux:
  Installed: 2.6.28.4.4
  Candidate: 2.6.28.4.4
  Version table:
 *** 2.6.28.4.4 0
        500 http://archive.ubuntu.com jaunty/restricted Packages
        100 /var/lib/dpkg/status
bzr:
  Installed: 1.9-1
  Candidate: 1.9-1
  Version table:
 *** 1.9-1 0
        500 http://archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status
bzr-gtk:
  Installed: 0.95.0-1ubuntu6
  Candidate: 0.95.0-1ubuntu6
  Version table:
 *** 0.95.0-1ubuntu6 0
        500 http://archive.ubuntu.com jaunty/universe Packages
        100 /var/lib/dpkg/status
W: Unable to locate package bzr-notify
root@thomas-laptop:/home/thomas# lsb_release -rd ; uname -a ; apt-cache policy linux bzr bzr-notify bzr-gtk

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/bzr-notify
InterpreterPath: /usr/bin/python2.5
Package: bzr-gtk 0.95.0-1ubuntu6
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/bzr-notify
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/bzr-notify']
SourcePackage: bzr-gtk
Title: bzr-notify crashed with DBusException in __new__()
Uname: Linux 2.6.28-00004-g7d55917-dirty i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare