Traceback (most recent call last):
  File "/usr/bin/skencil", line 34, in <module>
    Sketch.main.main()
  File "/usr/lib/skencil/Sketch/Base/main.py", line 148, in main
    run_script = options.run_script)
  File "/usr/lib/skencil/Sketch/UI/skapp.py", line 183, in __init__
    self.build_window()
  File "/usr/lib/skencil/Sketch/UI/skapp.py", line 223, in build_window
    self.run_script)
  File "/usr/lib/skencil/Sketch/UI/mainwindow.py", line 98, in __init__
    self.build_menu()
  File "/usr/lib/skencil/Sketch/UI/mainwindow.py", line 901, in build_menu
    self.update_mru_files()
  File "/usr/lib/skencil/Sketch/UI/mainwindow.py", line 380, in update_mru_files
    self.file_menu.RebuildMenu()
  File "/usr/lib/skencil/Sketch/UI/tkext.py", line 367, in RebuildMenu
    self.menu.delete(0, END)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 2683, in delete
    if c in self._tclCommands:
TypeError: argument of type 'NoneType' is not iterable