Get the error when I click on the 'Unit Settings' icon

[Patrice Massieh]

Distribution: Ubuntu 11.10 oneiric
Application: Ubuntu Tweak 0.6.0+20111104
Desktop:ubuntu-2d

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 439, in _load_module
    page = module()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/tweaks/unity.py", line 76, in __init__
    key='/apps/metacity/general/compositing_manager'),
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/factory.py", line 48, in create
    return getattr(cls, 'do_create')(widget, **kwargs)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/factory.py", line 85, in do_create
    new_widget = globals().get(widget)(**kwargs)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/gui/widgets.py", line 26, in __init__
    self.set_active(self._setting.get_value())
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/settings/gconfsettings.py", line 35, in get_value
    gconfvalue = self.client.get(self.key)
  File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function
    return info.invoke(*args, **kwargs)
GError: Configuration server couldn't be contacted: D-BUS error: Method "LookupExtended" with signature "ssb" on interface "org.gnome.GConf.Database" doesn't exist