I committed a fix in r71057 where instead of hard-coding the paths I
moved over to os.path.join(). Let me know if that fixes it.

As for the deletion hole that Vista has, it could be added to
test.test_support.unlink(), but talking here at PyCon it sounds like it
might be up to 15 seconds which is way too long to wait for a file
deletion to complete. Might need to create a context manager that
creates unique files every time. But all of this should be covered in
another issue.