diseño de fondo en web falla en opera

<style type="text/css">
<!--
body {
	background-color: #000000};

.fondonorepe {
	background-attachment: scroll;
	background-image: url(imx/fondo.jpg);
	background-repeat: no-repeat;
	background-position: 0px 0px;
}
.Estilo1 {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 10px;
	color: #FFFFFF;
}
<!-- Inicio Contador -->
<script type="text/javascript" language="javascript">
<!--
var sc_project=1136624; 
var sc_invisible=0; 
var sc_partition=10; 
var sc_security="4456a7e5"; 
var sc_remove_link=1;

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->
</script>
<!-- Fin contador -->
-->
</style>