IDLE fails to start on my MacBook [OS 10.5, v2.6b3 and v3.0b3, built
from source].  At the call to delete in the backtrace below index1 is 1
and index2 is 'end'.

python2.6 lib/python2.6/idlelib/idle.py
Traceback (most recent call last):
  File "lib/python2.6/idlelib/idle.py", line 21, in <module>
    idlelib.PyShell.main()
  File "/usrlocal/lib/python2.6/idlelib/PyShell.py", line 1396, in main
    shell = flist.open_shell()
  File "/usrlocal/lib/python2.6/idlelib/PyShell.py", line 275, in open_shell
    self.pyshell = PyShell(self)
  File "/usrlocal/lib/python2.6/idlelib/PyShell.py", line 816, in __init__
    OutputWindow.__init__(self, flist, None, None)
  File "/usrlocal/lib/python2.6/idlelib/OutputWindow.py", line 16, in
__init__
    EditorWindow.__init__(self, *args)
  File "/usrlocal/lib/python2.6/idlelib/EditorWindow.py", line 234, in
__init__
    self.update_recent_files_list()
  File "/usrlocal/lib/python2.6/idlelib/EditorWindow.py", line 763, in
update_recent_files_list
    menu.delete(1, END)  # clear, and rebuild:
  File "/usrlocal/lib/python2.6/lib-tk/Tkinter.py", line 2665, in delete
    for i in range(self.index(index1), self.index(index2)+1):
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'