Traceback (most recent call last):
  File "snowballz.py", line 642, in <module>
    main.lobby(mapname)
  File "snowballz.py", line 80, in lobby
    self.run()
  File "snowballz.py", line 204, in run
    self.run_loop()
  File "snowballz.py", line 211, in run_loop
    self.loop()
  File "snowballz.py", line 365, in loop
    display.draw(self, dt)
  File "/usr/share/games/snowballz/display.py", line 209, in draw
    if s.move():
  File "/usr/share/games/snowballz/snowball.py", line 122, in move
    v = u.detect_hit(self)
  File "/usr/share/games/snowballz/unit.py", line 665, in detect_hit
    events.fire(events.PENGUIN_FROZEN, self, snowball.penguin)
  File "/usr/share/games/snowballz/events.py", line 29, in fire
    c(*params)
  File "/usr/share/games/snowballz/plugins/powerup/__init__.py", line 48, in frozen
    powerup.take_from_penguin()
  File "/usr/share/games/snowballz/plugins/powerup/__init__.py", line 116, in take_from_penguin
    Powerup.take_from_penguin(self)
  File "/usr/share/games/snowballz/plugins/powerup/__init__.py", line 93, in take_from_penguin
    self.penguin.remove_emblem(self.emblem)
  File "/usr/share/games/snowballz/unit.py", line 96, in remove_emblem
    self._emblems.remove(emblem)
KeyError: <plugin.Emblem object at 0xa54a54c>