Google Chrome rendering XML as text for RSS feed

I have this script to generate an XML file for an RSS feed. Works great in every browser except Chrome. Chrome just renders the XML as text. Something to do with header("Content-Type: application/rss+xml; charset=ISO-8859-1"); possibly?

This is the code I'm using:

<?php$linkUp = "http://localhost/sites/myBlog/";header("Content-Type: application/rss+xml; charset=ISO-8859-1");$rssfeed  = '<?xml version="1.0" encoding="ISO-8859-1"?>';$rssfeed .= '<rss version="2.0">';$rssfeed .= '<channel>';$rssfeed .= '<title>Mytitle</title>';$rssfeed .= '<link>' . $linkUp . '</link>';$rssfeed .= '<description>Mydescription</description>';$rssfeed .= '<language>en-us</language>';$rssfeed .= '<copyright>&copy; ' . strftime('%Y') .  ' . "" . ' . $linkUp . '</copyright>';$query = "SELECT * FROM rss";$result = $db->query($query);while($row = $db->fetch_array($result)) {    $rssfeed .= '<item>';    $rssfeed .= '<title>' . $row['rss_title'] . '</title>';    $rssfeed .= '<description>' . $row['rss_description'] . '</description>';    $rssfeed .= '<link>' . $row['rss_link'] . '</link>';    $rssfeed .= '<pubDate>' . date("D, d M Y H:i:s O", strtotime($date)) . '</pubDate>';    $rssfeed .= '</item>';}$rssfeed .= '</channel>';$rssfeed .= '</rss>';echo $rssfeed;?>