Podcast App problem

So, I've Google'd until my head is going to explode, so it is time to ask the question...

The new app in 2.0 is actually useful and I have been able to add several of the podcasts that I listen to without issue. However, there are a bunch of video podcasts that I can't seem to add.

I have tried entering the URL in every way imaginable and keep getting back "No podcasts found at this address". What gives? What am I doing wrong?

As an example, one of the feeds I am trying to enter is The Grid, the RSS URL is The Grid and that is what I have been trying to enter into the app. I can pull the URL up on my browser and see everything there, but the podcast app is not happy about it...

Any help?

You're not doing anything wrong. I can't add it either...

So, what gives?

Why do some feeds work and other feeds don't?