Rieccomi

Da ieri sto impazzendo per tentarebla validazione dei feed del mio blog su WP, mi dà errore su questa stringa


codice:
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="it" lang="it" dir="ltr">

Posto la parte iniziale del codice:


codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="it" lang="it" dir="ltr">
 <head>
	<title><?php wp_title('&laquo;', true, 'right'); ?> <?php bloginfo('name'); ?></title>
 <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<meta name="Author" content="Grazia Colasuonno" />
<meta name="Copyright" content="2010 Grumo Appula Web" />
<meta name="DC.format" content="text/html" />
<meta name="description" content="Il salotto culturale di Grumo Appula" />
<meta name="keywords" content="confraternita, rosario, grumo appula, Grumo Appula, grumo" />
<meta name="robots" content="all" />
<meta name="creation_Date" content="23/05/2010" />

<link rel="shortcut icon" href="http://www.grumoappulaweb.net/favicon.ico" />
<link rel="stylesheet" href="http://www.grumoappulaweb.net/info/css/lightbox.css" type="text/css" media="screen" />
 
	<style type="text/css" media="screen">
		@import url( <?php bloginfo('stylesheet_url'); ?> );
	</style>

	<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />
	<?php wp_get_archives('type=monthly&format=link'); ?>
	<?php //comments_popup_script(); // off by default ?>
	<?php wp_head(); ?>
    
<script type="text/javascript" src="http://www.grumoappulaweb.net/motionpack.js"></script>
   <script type="text/javascript" src="http://www.grumoappulaweb.net/ultimamodifica.js">
</script>
   <script type="text/javascript" src="http://www.grumoappulaweb.net/preload.js">
</script>

 <script type="text/javascript">
var bookmarkurl="http://www.grumoappulaweb.net/"
var bookmarktitle="Grumo Appula Web - Il salotto culturale di Grumo Appula"
function addbookmark(){
if (document.all)
window.external.AddFavorite(bookmarkurl,bookmarktitle)
}
</script>    
    
</head>

Perché mi dà errore???? Non è tutto corretto???