Comment 3 for bug 380151

I've seen that error if Rhythmbox isn't already running when the script is run. DBUS auto-launches Rhythmbox, but doesn't always give it time to load its playlists. Not sure if that's a DBUS/Rhythmbox bug.

I should probably add code to preemptively check for Rhythmbox and launch it if necessary first, or something, but for now the workaround is to have it running first. Hopefully that helps.