All I can say is, that the podcast feed isn't working.
I used to use the PubSubHubbub plug-in, but it seems that your plug-in isn't compatible with it. So I deactivated PubSubHubbub, because podcasting is more relevant to me. But still no luck.
You can check it out here: http://www.econore.com/?feed=podcast
When I use the WordPress standard http://www.econore.com/podcast/feed/, it loads at least but lacks all post-content except the media files.
Any idea? Wouldn't it be easier to have the standard way work as intended?
Besides that, props for your plug-in!It really holds what it promises!!
That's why I ask you to fix it, I don't want to change!