I filed a separate bug against pulseaudio for that. Another issue that might have some bearing on this bug: In trying to stop pulseaudio from autostarting, I found out that the .desktop file for 'gnome-volume-control-applet' has the following key in it:
'TryExec=/usr/bin/pulseaudio' -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

