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" <?php language_attributes(); ?>>
<head>
<title><?php op_document_title(); ?></title>
<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />

<?php op_head(); ?>

<?php wp_head(); ?>

<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" />

</head>
<body>
<div id="body-container">

<div id="extra-container">

	<?php op_before_header(); ?>
	<div id="header-container">
		<div id="header">
			<h1 id="site-title">
<div class="adsensebnr">
<script type="text/javascript"><!--
google_ad_client = "pub-6816707329236017";
google_ad_slot = "7294101753";
google_ad_width =468;
google_ad_height =60;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div>				"><span><?php bloginfo('title'); ?> </span>
		</h1>
			<h2 id="site-description"><span><?php bloginfo('description'); ?>></span></h2>
	</div>

		<?php op_header(); ?>
	</div>
	<?php op_after_header(); ?>

	<div id="container">

		<div id="<?php echo op_page_id(); ?>" class="<?php echo op_page_class(); ?>">


questo è tutto l'header!
sto controllando tutto..ma non trovo nulla di sbagliato..