Py30rc1

On Windows the file object returned by urllib.request.urlopen() appears
to be in binary mode, so .read() returns a bytes object. But on Linux it
appears to be in text mode, so .read() returns a str object. It seeems
to me that the same type of file object should be returned on all
platforms, otherwise you have to test the platform and use str.encode()
or bytes.decode() depending on where the code is running.