grekoz1 on "Problems with RSS Feeds Moving from Ubuntu to CentOS"

I moved my wordpress from Ubuntu to CentOS. My sites are working, more or less, but I'm having problems with my RSS feeds. Since moving, I'm getting a "Parse Error" when I try to view the site feed on all the sites. Here is the error from Firefox:

XML Parsing Error: not well-formed
Location: http://www.mydomain.com/feed/
Line Number 1, Column 3:

<?
--^

If I view source, I get this:

<?
include dirname(__FILE__) . "/wp-search-mu/wpSearch.php";
?><?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
xmlns:content="http://purl.org/rss/1.0/modules/content/"
xmlns:wfw="http://wellformedweb.org/CommentAPI/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
>

<channel>

Any ideas?