problem: saving files in IDLE

Hi,

I've got a Problem when I want to save a .py file in
Idle. Most times it works, but sometimes I can't save
my file. In the "Python Shell" Window, I get the message:

Exception in Tkinter callback
Traceback (most recent call last):
File
"/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
1343, in __call__
return apply(self.func , args)
File "/usr/lib/idle/IOBinding.py", line 136, in save_as
if self.writefile( filename):
File "/usr/lib/idle/IOBinding.py", line 151, in writefile
chars = str(self.text.g et("1.0", "end-1c"))
UnicodeError: ASCII encoding error: ordinal not in range(128)

What can I do?


Thanks,
Tom