Hi Jason,
it has probably nothing to do with podPress. Have you tried to open one of the episode URLs from feed with your web browser? I have tried the URL of the latest episode win a Firefox browser and the request gets rerouted by Boxcloud. It works in Chrome.
But the big problem for Firefox and the iTunes Server seems to be the missing file name extension (e.g. .mp3 or .m4a).
The forwarding URL (from the Boxcloud server) needs to point to a real file with a web compatible filename with a known filename extension.
Tim
