I’ve just upgraded to WordPress 2.3.1 and noticed a new link being added to the header.
<link rel="wlwmanifest" type="application/wlwmanifest+xml" href="http://alter.hk/wordpress/wp-includes/wlwmanifest.xml" />wlwmanifest.xml is a resource file that Windows Live Writer needs to enable tagging support. If you are not using RSD or Windows Live Writer, we can disable this by creating a plugin.
<?php
/**
* Plugin Name: Remove RSD Link
* Plugin URI: http://alter.hk/wordpress/remove-rsd-link
* Description: This will remove the RSD link that is appended in the head.
* Version: 0.1
* Author: del
* Author URI: http://alter.hk/
* License: Copyright 2007 ALTER.HK. All Rights Reserved.
*/
remove_action('wp_head','rsd_link');
remove_action('wp_head', 'wlwmanifest_link');
?>