File Not Found for Feed?

My blog is hosted at http://www.campmarfa.com

When I go to burn it at Feedburner, I’m told that: “An error occurred connecting to the URL: Error getting URL: 404 – Not Found” for the feed at http://www.campmarfa.com/feed/.

Here is what I’ve tried so far:

Upgrading to 2.8.5.

Downloading the newest version of WP and reinstalling the feed files.

Changing the permalinks back to default.

Tried different templates.

Uninstalling plugins, such as a shopping cart that produced it’s own feed.

Reviewed .htaccess file for leading spaces and other errors.

Two days into this and I have no idea what is wrong. I really, really do not want to have to reinstall entirely. Your assistance is greatly appreciated.