Added it on, still no go
The whole section now looks like this (FYI):
`require_once(ZENFOLDER . "/template-functions.php");
$themepath = 'themes';
$host = htmlentities($_SERVER["HTTP_HOST"], ENT_QUOTES, 'UTF-8');
function fixRSSDate($bad_date) {`
(the reason I need it to validate is because I have Feedburner turning the feed into HTML and publishing it on my front page: www.zerflin.com)