problema con pagina en firefox

[lucasmoadr]

Alguien me podria ayudar con este css. el tema es que se ve bien en internet explorer, pero no en firefox y chrome.
Les paso el codigo, a ver si alguien me da una mano.
Gracias!!

BODY{
background-image:url(/images/bg.png);[/url]
background-attachment:scroll;
background-repeat:repeat-x;
font-family: Trebuchet MS, Helvetica, sans-serif;
background-color:#63737A;
}

.header{
width:730px;
background-image:url(/images/header.gif);[/url]
height:69px;}

.mid_column{
width:730px;}

.block_btm{
width:730px;
height:15px;}

.blocks1{
width:152px;
height:25px;
background-color:#333333;
float:left;
color:#C2F203;
padding:0px;
padding-left:15px;
padding-right:15px;
font-weight:bold;
font-size:11px;}

.blocks2{
width:151px;
height:25px;
background-color:#333333;
float:left;
color:#C2F203;

padding-left:15px;
padding-right:15px;
font-weight:bold;
font-size:11px;}

.main_content_area{
background-color:#FFFFFF;
width:730px;
padding-top: 15px;
}

.footer{
width:730px;
}


.title{
color:#FFFFFF;
padding-top: 15px;
float:left;
width:500px;
height:50px;
font-weight: bold;
text-align: center;
font-size: 24px;
}

.navigation{
float:right;
padding-top:35px;
padding-right:15px;
color:#FFFFFF;}

.content_area{
width:547px;
float:left;
border-right: 1px #CCFF00 solid;
}

.sub_content{
background-color:#49555B;
width:167px;
float:right;
color: #FFFFFF;
margin-right:8px;
}

.sub_nav{
width:163px;
padding:10px;
color:#49555B;
border-right: 1px #CCFF00 solid;
font-size:10px;
}

h2{
font-size:16px;
margin:0px;
}

.content_area2{
width:350px;
float:right;
padding-right:5px;
padding-left:5px;
font-size:11px;}


a:link {color: #6666CC}
a:visited {color: #6666CC}
a:hover {color: #006699}
a:active {color: #6666CC}

.scroller{
overflow:auto;
width:150px;
height:200px;
border: solid 1px #CCCCCC;
list-style:none;}

.nav{
text-decoration:none;
color:#FFFFFF;
color:#FFFFFF;
font-weight:bold;
font-size:10px;}

.nav:visited{
text-decoration:none;
color:#FFFFFF;
}

.nav:hover{
text-decoration:none;
color:#FFFFFF;}

ul.menu{
margin:0px;
padding:5px;
list-style:none;
width:110px;}

img.screenshot{
width:60px;
height:50px;
float:right;}