compiz error while loading

[Czar]

Distribution: Ubuntu 10.10
Application: Ubuntu Tweak 0.5.7
Desktop: gnome

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/mainwindow.py", line 437, in setup_notebook
    page = module()
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 229, in __init__
    self.create_interface()
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 247, in create_interface
    hbox.pack_start(self.create_edge_setting(), True, False, 0)
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 362, in create_edge_setting
    combobox = self.create_edge_combo_box("TopLeft")
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/compiz.py", line 339, in create_edge_combo_box
    setting = plugin.Display[v]
AttributeError: 'compizconfig.Plugin' object has no attribute 'Display'