Hmm. Am I missing something here?
When I click on your "this validation" link, I get a message that says "Sorry this link does not validate, line 13, column 151: Undefined feed element: feedburner:info."
Also, the latest post on my blog is "The Candied Grill Concept" and the first post I see at the W3 validator is the older post, "Top 10 Reasons to Own a Charcoal Grill" (Line 18). So, this is also one post behind, right?
Also, is the activating of the plugins immediately testable? I did, recently, deactivate everything, but the problem persisted. Should I be giving a certain number of hours before reactivating?
Sorry, I've just gotten completely confused about what's going on with this -- which seems like a basic function of a blog that should be straightforward. I will continue to seek help from the FeedBurner end. I agree that's likely where the problem is.
This thread has me concerned I won't be able to get much of a response from FeedBurner/Google.