pavucontrol doesn't honor volume up/down keys

Binary package hint: pavucontrol

I have a USB audio device with volume up, volume down, and mute buttons. When using these buttons in GNOME in intrepid, there is onscreen notification that they are recognised, and accepted. However, the volume of the audio stream does not change or mute. This may be an interaction with gnome-volume-control, and be dependent on bug #179095, but it does make the experience of using the device a little odd.