Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/Alacarte/MainWindow.py", line 434, in on_item_tree_show_toggled
    self.editor.setVisible(item, False)
  File "/usr/lib/pymodules/python2.6/Alacarte/MenuEditor.py", line 219, in setVisible
    self.__writeMenu(item, no_display=True)
  File "/usr/lib/pymodules/python2.6/Alacarte/MenuEditor.py", line 580, in __writeMenu
    file_id = os.path.split(menu.get_desktop_file_path())[1]
  File "/usr/lib/python2.6/posixpath.py", line 82, in split
    i = p.rfind('/') + 1
AttributeError: 'NoneType' object has no attribute 'rfind'