unpickle from URL problem

[Alan Isaac]

I am on a Windows box.

I pickle a tuple of 2 simple objects with the pickle module.
It pickles fine.  It unpickles fine.

I upload to a server.
I try to unpickle from the URL.  No luck.  Try it:
x1, x2 = pickle.load(urllib.urlopen('http://www.american.edu/econ/notes/hw/example1'))

I change the filetype to unix.  I upload again.
I try to unpickle from the URL.  Now it works.  Try it:
x1, x2 = pickle.load(urllib.urlopen('http://www.american.edu/econ/notes/hw/example2'))

Why the difference?

Thank you,
Alan Isaac