Here's Taro message:
"""
Turtle.py hanging is hardly important, but it's symptomatic of an
underlying problem, and I can still reproduce in Python 3...

Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit
(Intel)] on win32
System is Windows XP

The procedure to reproduce is:
a/ Open the directory in Explorer (for me it's D:\Python30\Lib)
b/ right click on Turtle.py and select the "Edit with IDLE" menu option
    (IDLE will open with an "IDLE 3.0      ==== No Subprocess ====" in
the header, along with a turtle.py window; the Shell menu will be missing)
c/ hit the F5 key to run turtle.py
d/ let the demo run
e/ click on the turtle
    (Turtle has not quit and returned to the prompt)
f/ ^Q out of IDLE (yes to force-quit)
g/ Open the Windows Task Manager
    (You now have a zombie pythonw.exe process)
"""