Comment 2 for bug 571391

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/mainwindow.py", line 400, in setup_notebook
    page = module()
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/loginsettings.py", line 72, in __init__
    self.__setup_background_image()
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/modules/loginsettings.py", line 105, in __setup_background_image
    pixbuf = gtk.gdk.pixbuf_new_from_file(background_path)
GError: Failed to open file '/usr/share/backgrounds/warty-final-ubuntu.png': No such file or directory