I recently updated the iTunes feed for my podcast using the built-in PodPress iTunes Update feature. The new feed for the most part seems to work great, and its settings are essentially the same as the old feed (it is just on a new site/domain). In iTunes, though, the feed does not display correctly. It has posts from August 2013 and earlier and one "empty" entry from December 2013, but nothing in between. This occurs both in the store and when manually adding via the "Subscribe to Podcast" menu item.
What is going on here? How come others can see the feed correctly but iTunes can't? Is there anything wrong with the feed? (It can be found here: http://elmad.pardes.org/feed/podcast)