Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/timerapplet/controllers/TimerApplet.py", line 147, in <lambda>
    self._presets_store.get_model().connect('row-changed', lambda model, row_path, row_iter: self._update_popup_menu())
  File "/usr/lib/python2.5/site-packages/timerapplet/controllers/TimerApplet.py", line 246, in _update_popup_menu
    popup.set_prop('/commands/PauseTimer', 'hidden', to_hidden_str(show_pause))
AttributeError: 'NoneType' object has no attribute 'set_prop'