[Link14716]

Try this:

PHP Code:

if ($_REQUEST['type'] == 'MEDIA')
{ // check for attachments
    $attachments = $DB_site->query("
      SELECT attachment.filename, attachment.filesize, attachment.attachmentid, attachment.postid
      FROM " . TABLE_PREFIX . "attachment
      LEFT JOIN " . TABLE_PREFIX . "post ON (post.postid = attachment.postid)
      LEFT JOIN " . TABLE_PREFIX . "thread ON (post.threadid = thread.threadid)
      WHERE post.postid = thread.firstpostid
      ORDER BY thread.dateline DESC
      LIMIT 15
    ");
    while ($attachment = $DB_site->fetch_array($attachments))
    {
        echo "\t\t<enclosure url=\"" .htmlspecialchars("$vboptions[bburl]/attachment.php?$session[sessionurl]attachmentid=$attachment[attachmentid]&filename=$attachment[filename]") . "\" length=\"$attachment[filesize]\" type=\"audio/mpeg\" />\r\n";
    }
} 


After spending an hour over IRC, we finally got it to work correctly.

Link for mod!