NowPlayingScreenlet.py crashed with DBusException in call_blocking()

Binary package hint: screenlets

NowPlayingScreenlet was running.
Rhytmbox was Running

i shut down my Rhytmbox player.
I get the attached exception

ProblemType: Crash
Architecture: i386
Date: Tue Apr 22 13:58:05 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/share/screenlets/NowPlaying/NowPlayingScreenlet.py
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: nvidia
Package: screenlets 0.0.12-0ubuntu4
PackageArchitecture: all
ProcCmdline: python -u /usr/share/screenlets/NowPlaying/NowPlayingScreenlet.py
ProcEnviron:
 PATH=/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/screenlets/NowPlaying/NowPlayingScreenlet.py']
SourcePackage: screenlets
Title: NowPlayingScreenlet.py crashed with DBusException in call_blocking()
Uname: Linux 2.6.24-16-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video