Nella visualizzazione del codice che riporto qui sotto Firefox non crea problemi, mentre IE mi crea uno spazion di 2px tra il div "menu" e il div "cerca"

Questo è il CSS
codice:
CSS



body {
margin:0;
border:0;
padding:0;
font-family:Verdana, Arial, Helvetica, sans-serif;
font-size:10px;
color:#00669a;
background:#b2d6e8 url(struttura/sfondoBody.jpg) top left repeat;
}

#centrato{
width:800px;
margin:0 0 0 150px;
}

#testata {
position:relative;
width:800px;
height:135px;
background:url(struttura/testata.jpg) top left no-repeat;
}

#menu {
position:relative;
width:800px;
height:15px;
background:url(struttura/menu.jpg) top left no-repeat;
}

#cerca {
position:relative;
width:800px;
height:20px;
background:url(struttura/cerca-nel-sito.jpg) top left no-repeat;
}

.pulsanti {
position:absolute;
top:0;
left:60px;
}

.clear {
clear:both;
}

.pixel{
position:absolute;
top:0;
right:40px;
padding:0;
}

.trattino{
position:absolute;
top:4px;
left:60px;
}

E questo è l'html

codice:
HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>ri-animazione</title>
<link rel="stylesheet" href="CSS.css" type="text/css"/>
<!--[if IE]>
<link rel="stylesheet" href="CSS.css" type="text/css"/>
<![endif]-->
</head>

<body>
<div id="centrato">
	<div id="testata">
		<div class="pixel">
			[img]struttura/pixel_login.jpg[/img]
			[img]struttura/pixel_mail.jpg[/img]
		</div>
	</div>
	
	<div id="menu">
		[img]struttura/menu.jpg[/img]
		<div class="pulsanti">
			<span>
				<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="80" height="12">
				  <param name="movie" value="componenti%20flash/home_btn.swf">
				  <param name="quality" value="high">
				  <embed src="componenti%20flash/home_btn.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="80" height="12"></embed>
				</object>
			</span>
			<span>
				<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="80" height="12">
				  <param name="movie" value="componenti%20flash/attivit&#224;_btn.swf">
				  <param name="quality" value="high">
				  <embed src="componenti%20flash/attivit&#224;_btn.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="80" height="12"></embed>
				</object>
			</span>
			<span>
				<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="80" height="12">
				  <param name="movie" value="componenti%20flash/chi_btn.swf">
				  <param name="quality" value="high">
				  <embed src="componenti%20flash/chi_btn.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="80" height="12"></embed>
				</object>
			</span>
			<span>
				<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="80" height="12">
				  <param name="movie" value="componenti%20flash/download_btn.swf">
				  <param name="quality" value="high">
				  <embed src="componenti%20flash/download_btn.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="80" height="12"></embed>
				</object>
			</span>
			<span>
				<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="80" height="12">
				  <param name="movie" value="componenti%20flash/contatti_btn.swf">
				  <param name="quality" value="high">
				  <embed src="componenti%20flash/contatti_btn.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="80" height="12"></embed>
				</object>
			</span>
		</div>
	</div>
	
	<div id="cerca">
		<div class="trattino">
			[img]struttura/trattino_home.jpg[/img]
		</div>		
	</div>

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

Grazie mille a chiunque mi aiuti o legga il post
Aspetto con trepidazione