Feed stopped working after upgrading to 2.7

Three days ago FeedBurner began showing that I had 0 subscribers. It was around that time that I upgraded to WordPress 2.7.

Now when I access my feed, I get these error messages. Any idea how I can fix my RSS feed?

Bang! Kapowww! Krakkk!

(FeedBurner encountered an error while trying to bring you this feed and is now keeping its head down. Details follow.)
Feed Address: https://feeds.feedburner.com/ZachEverson

HTTP Error Code: 500

Detail: There was a problem retrieving the feed: java.net.SocketTimeoutException: Read timed out

There has been an error of some kind. Ack!

FeedBurner could not deliver this feed to you because of the specific problem listed below:
Feed Address: feed://feeds.feedburner.com/fb/a/feedbackSubmit

HTTP Error (Code) and Message: (404) Feed not found error: FeedBurner cannot locate this feed URI.

What can I do about this?
If you are a potential or current subscriber, contact the publisher to notify them that their feed content is not available. This may be temporary problem that requires their intervention to resolve, or the publisher may have permanently removed the feed from FeedBurner.
If you are the publisher of this feed, sign into FeedBurner and visit your feed’s “Troubleshootize” tab to view FeedMedic, our automated diagnostic report for your feed. A cause for the problem, and tips for troubleshooting it, may be found there