Problème de compatibilité CSS avec IE

body{
background:#E7ECFF url(img/bodybg.gif) repeat;
color:#505050;
font:82% Verdana,Tahoma,Arial,sans-serif;
margin:0;
padding:0;
text-align:center;
}

p{
line-height:20px;
margin:0 0 15px;
}

a{
color:#3E80B4;
font-weight:700;
text-decoration:none;
}

a:hover{
color:#d04a10;
}

hr{
height:1px;
margin:10px 0;
width:98%;
}

dt{
font-weight:700;
}

dd{
margin:1px 0 12px 15px;
}

#container{
background:#E7ECFF ;
margin:0 auto;
text-align:left;
width:952px;
}

#sitename{
background:url(img/leaves.jpg) top center no-repeat;
color:#ffffff;
font-weight:400;
height:100px;
margin:0 0px 4px 0;
text-align:center;
}

#sitename h1{
font-size:29px;
margin:0;
padding-top:20px;
}

#sitename span{
font-size:21px;
letter-spacing:-1px;
margin:0;
}

#nav{
background:url(img/greypx.gif) bottom left repeat-x;
float:left;
width:952px;
}

#nav ul{
list-style:none;
margin:0;
padding:0;
}

#nav a{
background:url(img/tabs.gif) no-repeat 100% 0;
color:grey;
display:block;
font-size:16px;
letter-spacing:-1px;
padding:7px 20px 4px 11px;
text-decoration:none;
}

#nav a:hover{
color:#505050;
}

#nav li{
background:url(img/tabs.gif) no-repeat 0 0;
float:left;
margin:0 4px 0 0;
padding:0 0 0 9px;
}

#nav #current{
background:url(img/tabs.gif) no-repeat 0 -41px;
}

#nav #current a{
background:url(img/tabs.gif) no-repeat 100% -41px;
color:#303030;
padding:7px 20px 5px 11px;
}

#wrap1{
background:#ffffff url(img/innerbg.gif) repeat-y;
border-bottom:1px solid #808080;
border-left:1px solid #808080;
border-right:1px solid #808080;
clear:both;
padding:0;
width:950px;
}

#wrap2{
background:url(img/header.jpg) top left no-repeat;
padding:10px;
width:930px;
}

#header{
height:30px;
position:relative;
width:930px;
}

#header h1{
float:left;
font-size:19px;
margin:0;
width:180px;
}

#topbox{
color:#808080;
margin:0 0 4px;
text-align:right;
}

#topbox a{
color:#3E80B4;
}

#topbox a:hover{
text-decoration:underline;
}

#leftside{
float:left;
margin:-20px 0 0;
width:210px;
}

#leftside h1{
font-size:19px;
font-weight:400;
}

#rightside{
float:right;
margin:40px 15px 20px 0;
width:75px;
}

#rightside h1{
font-size:19px;
font-weight:400;
margin:0 0 12px;
}

#rightside p{
font-size:13px;
margin:2px 0 12px 10px;
}

#rightside img{
border:1px solid #3E80B4;
margin:10px 0 5px 5px;
padding:2px;
}

#content{
margin:45px 40px 0 240px;
}

#contentalt{
margin:45px 15px 0 180px;
}

#content p,#contentalt p{
margin:8px 0 0 10px;
}

#content h1,#contentalt h1{
color:#505050;
font-size:27px;
font-weight:400;
margin:15px 0 10px;
padding:0;
}

#content h2,#contentalt h2{
color:#505050;
font-size:20px;
font-weight:400;
margin:20px 0 10px;
padding:0;
}

#footer{
clear:both;
color:#a0a0a0;
font-size:12px;
height:26px;
margin-top:20px;
padding:1px;
text-align:right;
width:930px;
}

#footer a{
color:#a0a0a0;
font-weight:400;
}

#footer a:hover{
color:#a0a0a0;
text-decoration:underline;
}

.menublock{
margin-bottom:10px;
}

.nav{
color:#FFFFFF;
display:block;
font-size:15px;
font-weight:700;
margin-bottom:0;
padding:0px 0px 0px 5px;
position:relative;
text-decoration:none;
width:170px;
}

.nav:hover{
color:#505050;
padding:0px 0px 0px 5px;
}

.sub{
font-size:12px;
margin-left:20px;
padding:1px 1px 1px 6px;
width:105px;
}

.sub:hover{
border:1px solid #3E80B4;
color:#505050;
padding:0 0 0 5px;
}

.intro{
font-weight:700;
}

.active{
border:1px solid #3E80B4;
padding:1px 1px 1px 9px;
}

.box{
background:#f8f8f8 url(img/boxbg.gif) top left repeat-y;
border:1px solid #3E80B4;
color:#505050;
margin:15px auto;
padding:10px 10px 10px 20px;
width:75%;
}

.photo{
margin:5px auto 15px;
padding:5px;
}

.smallcaps{
font-variant:small-caps;
}

.mini{
color:#a0a0a0;
font-size:10px;
font-weight:400;
line-height:16px;
margin:20px 0 10px 8px;
}

.small{
font-size:11px;
}

.large{
font-size:19px;
}

.soft{
color:#FFFFFF;
}

.normal{
font-weight:400;
}

.sharp{
color:#101010;
}

.center{
text-align:center;
}

.hide{
display:none;
}