OK so I was able to get this issue reproduced by Apple support - its only an issue on the iPhone in iTunes. They say to contact the publisher of the Podcast.
from iTunes Store <msmac@apple.com>
date Thu, Dec 31, 2009 at 2:07 PM
subject Re: ITMS: Podcast cannot be accessed on the iPhone (only on comp; Follow-up
mailed-by apple.com
hide details 12/31/09 (5 days ago)
David here again, thank you so much for all of your patience I really appreciate it. We have contacted/worked with the publisher of this Podcast for this problem so you'll need to contact the publisher if you continue to experience any more issues.
I hope this has been helpful.
Best Wishes,
David C.
iTunes Store Senior Advisor
Please Note: I Work Tue-Sat 8:00am to 5:00pm (PST)