Paul, the "Stop & Quit" action is certainly a plus, but it doesn't solve this precise bug report, as there still is a case where "Rhythmbox stays running in the background after quit" (if you just close the window). I'm not the one to decide whether or not this is the desired behaviour, but I just think that the "Stop & Quit" action is only a workaround for this bug.
Paul, the "Stop & Quit" action is certainly a plus, but it doesn't solve this precise bug report, as there still is a case where "Rhythmbox stays running in the background after quit" (if you just close the window). I'm not the one to decide whether or not this is the desired behaviour, but I just think that the "Stop & Quit" action is only a workaround for this bug.