Perchè succede questo ?

[albgen]

Guardate le due foto. perchè questa differenza tra i due browser ? (Firefox e IE)


CSS della pagina:

body {
margin:10px 10px 0px 10px;
padding:0px;
}

#leftcontent {
position: absolute;
left:10px;
top:50px;
width: 200px;
background:#FEF;

border:1px solid #090;
background-color: #FFD6A4;
background-attachment: scroll;
background-position: center;
border-left: 1px solid #929292;
border-left-width: 20px;
border-style: solid;
clear: none;
margin-left: 0px;
padding: 0;
}

#centercontent {
top:59px;
background:#fff;
margin-left: 199px;
margin-right:199px;
border:1px solid #090;

voice-family: "\"}\"";
voice-family: inherit;
margin-left: 201px;
margin-right:201px;
}
html>body #centercontent {
margin-left: 201px;
margin-right:201px;
}

#rightcontent {
position: absolute;
right:10px;
top:50px;
width:200px;
background:#fff;
border:1px solid #000;
}

#banner {
background:#fff;
height:40px;
border-top:1px solid #000;
border-right:1px solid #000;
border-left:1px solid #000;
voice-family: "\"}\"";
voice-family: inherit;
height:39px;
}
html>body #banner {
height:39px;
}

p,h1,pre {
margin:0px 10px 10px 10px;
}

h1 {
font-size:14px;
padding-top:10px;
}

#banner h1 {
font-size:14px;
padding:10px 10px 0px 10px;
margin:0px;
}

#rightcontent p {
font-size:10px
}