Hi,

when there are invalid chars in a filename, os.path.exists
() behaves oddly, returning True.

The bug appears on win32 system, not on unix ones. 
Thus is probably related to some weird windows api call 
and doesn't maybe worth fixing.

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 
32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more 
information.
>>> import os
>>> f = file("a_b", "w")
>>> f.close()
>>> os.listdir(".")
['a_b']
>>> os.path.exists("a<b")
True
>>> os.path.exists("a>b")
True

And, even more strange...

>>> os.path.exists("a<")
True
>>> os.path.exists("a>")
False

Better answers would have been:
  * False
  * raise ValueError