Namespace: I just made two important changes to the location and person tags that are breaking changes. After some discussion with Angelo at Blubrry, we decided to remove the name="" attribute from these tags and move that string to the element's node value.
So,
<podcast:person name="Dave Jones" />
...becomes:
<podcast:person>Dave Jones</podcast:person>
Same with location:
<podcast:location name="Mount St. Helens" />
...becomes:
<podcast:location>Mount St. Helens</podcast:location>
@Castopod @dave I’ll update too, hopefully later today.