Yeah, I see it in Firefox 3.0.4 on Fedora 9 (see attached). Are you using a 1.x version of Firefox or something? I don't know what the problem could be... Try creating a new profile and then view your page. If you're on Windows, you can just launch the Profile Manager by going to the Run dialog and typing the following:
firefox -ProfileManager -no-remote
Create a new profile and view your page there:
firefox -P MyTempProfile -no-remote http://www.realdeadwoodpodcast.com/
I added the -no-remote option in the event that you wanted to have Firefox open using your main profile while trying this.