Traceback (most recent call last):
  File "/usr/bin/bzr-notify", line 15, in <module>
    gtk = open_display()
  File "/usr/lib/python2.6/dist-packages/bzrlib/plugins/gtk/__init__.py", line 103, in open_display
    set_ui_factory()
  File "/usr/lib/python2.6/dist-packages/bzrlib/plugins/gtk/__init__.py", line 75, in set_ui_factory
    bzrlib.ui.ui_factory = GtkUIFactory()
  File "/usr/lib/python2.6/dist-packages/bzrlib/plugins/gtk/ui.py", line 195, in __init__
    self.set_nested_progress_bar_widget(ProgressBarWindow)
  File "/usr/lib/python2.6/dist-packages/bzrlib/plugins/gtk/ui.py", line 224, in set_nested_progress_bar_widget
    self._progress_bar_stack = progress.ProgressBarStack(klass=widget)
AttributeError: 'module' object has no attribute 'ProgressBarStack'