mah questo viene pur validato

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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Untitled Document</title>
</head>

<body>
<form method="get" action="http://www.google.com/search">
<p style="font: normal 14px Arial">Cerca nel Sito:

<input name="q" type="hidden" />
<input name="qfront" type="text" style="width: 170px" /> <input type="submit" value="Cerca" /></p>
</form>
<p style="font: normal 12px Arial">Ricerca generata da:

Google.it</p>
</body>
</html>
non capisco il problema