my RSS is soooo broken

Hi Guys, I have a broken RSS that is probably simple to fix but I don’t have a clue how. My feed hasn’t updated since November, and I’ve searched many threads but nothing seems to work. Here’s the skinny:

RSS begets a 404 page, here:

http://theferrisfiles.com/feed

Feed Validator gives me no specific fixes, just says that there’s a problem downloading it from the server.

Things I’ve tried:
1) Disabling all plugins
2) removing excess spaces from the wp-config file
3) pinging Feedburner
4) prayer
5) chewing fingernails

Any ideas?