Ciao,
di seguito la soluzione al tuo problema.
Saluti, Alessandro
---
<!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="en" lang="it">
<head>
<title>Prova</title>
<style type="text/css" media="all">
#logo {
width:65px;
height:65px;
background: #fff url(http://forum.html.it/forum/images/av...atar_leone.gif) top left no-repeat;
}

#logo a {
display:block;
width:64px;
height:64px;
}
</style>
</head>
<body>
<div id="logo">

</div>
</body>
</html>