RSS Feed Problems

Hi all. I hope someone can help here. I am having problems with my RSS Feedburner feed. I get an error message when I try to validate it that you can see here:

http://feedvalidator.org/check.cgi?url=http%3a%2f%2furbansamurai.org.uk%2ffeed%2f

Any ideas on how to remove the offending junk and resolve this issue?