algous

> Does the new code fix your feed?
Yes.

Also you should replace first ‘strtolower’ to ‘mb_strtolower’:

if (function_exists('mb_split'))
{
	mb_regex_encoding(get_option('blog_charset'));
	$wordlist = mb_split('\s*\W+\s*', mb_strtolower($source));
}
else
	$wordlist = split('\s*\W+\s*', strtolower($source));