Jäger's podcasting feature is messed up with iTunes 4.7. Why? Because Apple changed the COM interfaces from 1 indexing to 0 indexing.

"pytunes" now has a lot of code that looks like this:

def __iter_tracks(self):
 for current in xrange(0, len(self.com_playlist.Tracks) + 1):
  try:
   yield Track(self, self.com_playlist.Tracks[current])
  except IndexError:
   continue

There'll be a release tonight that fixes this.