It functions without issue when testing it in iTunes, as well as not bringing up any errors during the submission process - it's only after they confirm it's been received and is awaiting approval that I get the email consisting of
Is there anything incorrect with this XML? It validates fine in all feed validators, and I've checked it against the Specs at http://www.apple.com/itunes/podcasts/specs.html and none of the common errors hold - there's no out-of-place entities, pubDate's in the right format, and all ampersands are accounted for. The categories all check out too.
The podcast files themselves also run fine when manually added to iTunes - the links in the XML are 302 redirects to the actual files, and that seems to work without issue normally.