Update:
I accessed my mythbox from my school's computer science lab. I was able to download my show!. These computers are running red hat with the mozilla suite. Hmmmm?

While on the linux machine, when I click on the link for a video the link goes to

http://ex.tern.al.ip/mythweb/video_dir/VideoNumber.nuv

however when on the windows box, a link to the show goes to:

myth://127.0.01:6543/VideoNumber.nuv

windows box does not have a working link.

I can easily do a workaround by switching in the actaual external IP on the windows box, however it would be nice to have the default link work on the windows machine.