Traceback (most recent call last):
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 619, in _signal_func
    if match.maybe_handle_message(message):
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 212, in maybe_handle_message
    self._handler(*args, **kwargs)
  File "/var/lib/python-support/python2.5/gnomeosd/eventbridge.py", line 338, in rhythmbox_dbus_song_change_cb
    bus = dbus.SessionBus()
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 671, in __new__
    mainloop=mainloop)
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 619, in _signal_func
    if match.maybe_handle_message(message):
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 212, in maybe_handle_message
    self._handler(*args, **kwargs)
  File "/var/lib/python-support/python2.5/gnomeosd/eventbridge.py", line 338, in rhythmbox_dbus_song_change_cb
    bus = dbus.SessionBus()
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 671, in __new__
    mainloop=mainloop)
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 619, in _signal_func
    if match.maybe_handle_message(message):
  File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 212, in maybe_handle_message
    self._handler(*args, **kwargs)
  File "/var/lib/python-support/python2.5/gnomeosd/eventbridge.py", line 341, in rhythmbox_dbus_song_change_cb
    props = rbshell.getSongProperties(uri)
  File "/var/lib/python-support/python2.5/dbus/proxies.py", line 87, in __call__
    return self._proxy_method(*args, **keywords)
  File "/var/lib/python-support/python2.5/dbus/proxies.py", line 171, in __call__
    reply_message = self._connection.send_message_with_reply_and_block(message, timeout)
DBusException: org.freedesktop.DBus.GLib.UnmappedError.RbShellError.Code0: Unknown song URI: