Problème Css firefox

Bonjour,

J'ai télécharger une Template pour Vbulletin mais celui ci affiche tout correctement sous IE, mais il manque 3 images sous Firefox.

J'arrive a les faires apparaitre en retirant les float mais après c'est tout décalé...

voici les deux code qui me semble problématif :

<!-- logo -->
<a name="top"></a>
<div class="WrathHeader" id="ArthasLeft"></div>
<div class="WrathHeader" id="ArthasRight"></div>
<div class="WrathLogo" id="Logo"></div>
<!-- /logo -->

C'est ce qui appel les images en css

DIV.WrathHeader {
background-attachment: scroll;
position: absolute;
margin-right: auto;
margin-left: auto;
top: 0px;
left: 0px;
width: 100%;
z-index: -2;
}
DIV.WrathHeader#ArthasLeft {
background-image: url(images/styles/wrath/backgrounds/ArthasLeft.png);
background-repeat: no-repeat;
background-position: left top;
height: 736px;
float: left;
}
DIV.WrathHeader#ArthasRight {
background-image: url(images/styles/wrath/backgrounds/ArthasRight.png);
background-repeat: no-repeat;
background-position: right top;
height: 736px;
float: right;
}
DIV.WrathLogo {
clear: both;
position: relative;
background-attachment: scroll;
top: 0px;
margin: auto;
z-index: 10;
}
DIV.WrathLogo#Logo {
background-image: url(images/styles/wrath/backgrounds/logo.png);
background-repeat: no-repeat;
background-position: center top;
height: 73px;
}
DIV.WrathFooter {
background-attachment: scroll;
position: relative;
width: 100%;
top: auto;
bottom: 0px;
left: 0px;
margin-right: auto;
margin-left: auto;
z-index: -3;
}
DIV.WrathFooter#PageFooter {
background-image: url(images/styles/wrath/backgrounds/page_footer.png);
background-repeat: no-repeat;
background-position: center bottom;
height: 298px;
}
DIV.WrathMainNav {
clear: both;
background-attachment: scroll;
position: absolute;
margin-right: auto;
margin-left: auto;
top: 56px;
left: 0px;
width: 100%;
height: 70px;
}
DIV.WrathMainNav#navi_bg {
background-image: url(images/styles/wrath/backgrounds/navi_bg.png);
background-repeat: no-repeat;
background-position: top center;
z-index: 1;
text-align: center;
size: 2em;
line-height: 2.5em;
color: #00CCFF;
}

Voila si vous saviez m'aidez   je serais très content