Aggregator module RSS link inheriting your site base URL rather than RSS location

So I made up a very simple php script that I run on my site that fixes the offending FB code. Replace FEEDURL with the full feed URL, and the USERNAME with your facebook username, and this will grab the feed, preg_replace the crappy relative URLs, and replace them with legal absolute URLs.

function get_url_contents($url) {
        //echo $url;
        $crl = curl_init();
        $timeout = 5;
        curl_setopt ($crl, CURLOPT_URL, $url);
        curl_setopt ($crl, CURLOPT_RETURNTRANSFER, 1);
        //curl_setopt ($crl, CURLOPT_CONNECTTIMEOUT, $timeout);
        curl_setopt ($crl, CURLOPT_HEADER, 0);
        curl_setopt ($crl, CURLOPT_USERAGENT, "Mozilla/4.0");
        $ret = curl_exec($crl);
        curl_close($crl);
        return $ret;
}

$url = 'FEEDURL';
$feed = get_url_contents($url);
$fixed = preg_replace("/<link>\/USERNAME\/posts\//", "<link>http://www.facebook.com/USERNAME/posts/", $feed);
echo $fixed;

For what it's worth, here's the bit FB neglected in implementing their RSS feed.

RSS places restrictions on the first non-whitespace characters of the data in
and elements. The data in these elements must begin with an IANA-registered URI scheme, such as http://, https://, news://, mailto: and ftp://. Prior to RSS 2.0, the specification only allowed http:// and ftp://, however, in practice other URI schemes were in use by content developers and supported by aggregators. Aggregators may have limits on the URI schemes they support. Content developers should not assume that all aggregators support all schemes.