I am having similar problems as well …
http://www.scottburkett.com/wp-rss.php
Looks like an encoding problem ….
@urbanmac: Check to ensure that you have don’t have any extra spaces in the file wp-rss.php. That might be the cause for your problem.
Validate your feed
@incursio: Your blog text seems to have a “&” in one post and it wasn’t translated to & for you, so that’s throwing off feed. Try changing the blog text to see if it fixes it.
Validate your feed
Regards
Removing the ampersand is not a solution. This is an encoding bug in 2.01, as has been reported in several other threads.
Cheers.