> But I can tell you that I've never had another FTP program fail like
> Python 3 is failing for me trying to what seems like a simple transfer
> of a text file (expecting the line endings to be adjusted).  

Python 3 is not failing, you are just using it the wrong way. Open your
file in binary mode (as opposed to text mode) and it should work. "Text
files" in Python 3 are files decoded to unicode while reading (and
encoded from unicode while writing); they are much more than simply
binary files with adaptive line endings. This is more or less documented
here (although I agree it would perhaps need a better introductory
paragraph):
http://docs.python.org/py3k/library/io.html