IndexError in Volume Control: list index out of range

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/awn/extras/awnlib.py", line 1462, in init_start
    applet_class(applet)
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 104, in __init__
    self.setup_context_menu(prefs)
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 169, in setup_context_menu
    self.load_track_pref(prefs)
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 220, in load_track_pref
    self.reload_tracks()
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 232, in reload_tracks
    self.backend.set_track(self.applet.settings["track"])
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 453, in set_track
    self.__parent.refresh_icon(True)
  File "/usr/share/avant-window-navigator/applets/volume-control/volume-control.py", line 264, in refresh_icon
    icon = [key for key, value in volume_ranges.iteritems() if volume <= value[0] and volume >= value[1]][0]
IndexError: list index out of range

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I tried to shift between different icons for the volume applet, when this error appeared.

My version of AWN is 0.4.0
Linux is Ubuntu 10.04 with Gnome.
I installed via repository.