Help! XFCE event sounds in Rawhide -- make it stop!

[Matthew Miller <mattdm mattdm org>]

My rawhide system has always had some sound oddities ever since the
pulseaudio switch -- it really needs a reinstall. But in the last couple of
days, something has been driving me crazy: there are suddenly loud,
obnoxious sound effects when I open or close windows. There doesn't seem to
be an XFCE control panel that has anything to do with this, and changing the
gnome one has no effect. Help! Help!

-- 
Matthew Miller           mattdm mattdm org          <http://mattdm.org/>
Boston University Linux      ------>              <http://linux.bu.edu/>