Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 561, in change_view
    self.update_view()
  File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 625, in update_view
    self.content_view.display_page("home.mako", messages)
  File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 274, in display_page
    template_path = os.path.join(theme_path, template_name)
  File "/usr/lib/python2.6/posixpath.py", line 67, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'