gwibber-preferences always crashes on startup

Binary package hint: gwibber

starting gwibber-preferences from gwibber menu or command line fails like:

gwibber-preferences

** (gwibber-preferences:23576): WARNING **: Trying to register gtype 'WnckWindowState' as enum when in fact it is of type 'GFlags'

** (gwibber-preferences:23576): WARNING **: Trying to register gtype 'WnckWindowActions' as enum when in fact it is of type 'GFlags'

** (gwibber-preferences:23576): WARNING **: Trying to register gtype 'WnckWindowMoveResizeMask' as enum when in fact it is of type 'GFlags'
Traceback (most recent call last):
  File "/usr/bin/gwibber-preferences", line 64, in <module>
    preferences.GwibberPreferences()
  File "/usr/lib/python2.6/dist-packages/gwibber/preferences.py", line 77, in __init__
    self.settings.bind(getattr(self, key + "_selector"), key)
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/config.py", line 82, in bind
    return Wrapper.bind(self, widget, key, **args)
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/config.py", line 60, in bind
    gwp.create_persistency_link(widget, "%s/%s" % (self.path, key), **args)
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/swp.py", line 192, in __call__
    return handler(widget, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/gwp.py", line 414, in _persistency_link_combobox
    return PersistencyLink(combo, combo.get_active_text, lambda val: combo.set_active_iter([x.iter for x in combo.get_model() if x[0].strip() == val][0]), "changed", GConfValue(key, data_spec, *args, **kwargs))
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/swp.py", line 81, in __init__
    if self.widget is not None: self.sync_widget()
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/swp.py", line 139, in sync_widget
    self._widget_setter(val)
  File "/usr/lib/python2.6/dist-packages/gwibber/microblog/gwp.py", line 414, in <lambda>
    return PersistencyLink(combo, combo.get_active_text, lambda val: combo.set_active_iter([x.iter for x in combo.get_model() if x[0].strip() == val][0]), "changed", GConfValue(key, data_spec, *args, **kwargs))
IndexError: list index out of range