Pb affichage balises sous IE

Bonjour,

Je me permets de demander de l'aide car j'ai créé un site (www.pacassistance.info) qui rencontre un souci uniquement avec Internet Explorer (j'ai la version 9 mais c'est pareil avec les autres).

En effet, mes balises pour les titres des menus et le logo du site ne s'affichent pas sous IE. J'ai parcouru plusieurs forums mais ne trouvant pas la réponse, je suis venu solliciter vos compétences.

Voici le code html pour la partie logo :

<div class="main">
<div class="header">
<div class="header_resize">
<div class="logo">
<h1 align="center"><span class="Style2"><span class="Style3">PAC</span><span class="Style5">ASSITANCE</span><span class="Style6">83</span></span><span class="Style7"><small><span class="Style3">chauffer</span> - économiser - <span class="Style6">climatiser</span></small></span></h1>
</div>

Et le code html qui pose aussi problème pour la partie titre des menus :

<div class="sidebar">
<div class="searchform">
</div>
<div class="clr"></div>
<div class="gadget">
<h2 class="star">BIENVENUE</h2>
<div class="clr"></div>
<ul class="sb_menu">
<li><a href="index.html">Accueil</a></li>
<li><a href="clim-chauffage.html">Climatisation et Chauffage</a></li>
<li><a href="pac.html">Pompe à chaleur air/eau</a></li>
<li><a href="services.html">Services</a></li>
<li><a href="formail1.html">Devis en ligne</a></li>
<li><a href="formail2.html">Nous contacter</a></li>
</ul>
</div>

Ensuite, voici dans les grandes lignes le code css :

@charset "utf-8";
body {
margin:0;
padding:0;
width:100%;
color:#6d6d6d;
font:normal 12px/1.5em "Liberation sans", Arial, Helvetica, sans-serif;
background:#f5f5f5 url(../images/main_bg.gif) repeat-x left top;
}
html, .main {
padding:0;
margin:0;
}
.main {
}
.clr {
clear:both;
padding:0;
margin:0;
width:100%;
font-size:0;
line-height:0;
}
h2 {
margin:8px 0;
padding:8px 0;
font-size:24px;
font-weight:normal;
color:#6e6e6e;
}
p {
margin:8px 0;
padding:0 0 8px 0;
}
a {
color:#88a9c3;
text-decoration:underline;
}
.header, .content, .menu_nav, .fbg, .footer, form, ol, ol li, ul, .content .mainbar, .content .sidebar {
margin:0;
padding:0;
}
.header {
}
.header_resize {
margin:0 auto;
padding:0;
width:960px;
}
.logo {
padding:0;
float:none;
float:left;
width:auto;
height:133px;
}
h1 {
margin:0;
padding:32px 0 0;
font-size:36px;
font-weight:bold;
line-height:1.2em;
text-transform:none;
}
h1 a, h1 a:hover {
color:#fff;
text-decoration:none;
}
h1 span {
}
h1 small {
display:block;
font-size:13px;
line-height:1.2em;
letter-spacing:normal;
text-transform:none;
color:#fff;
}
.rss {
padding:18px 20px 0 0;
float:right;
width:auto;
}
.rss p {
margin:0;
padding:0;
float:right;
width:auto;
color:#fff;
font-size:13px;
line-height:1.5em;
font-weight:bold;
}
.rss a {
color:#fff;
text-decoration:none;
}
.rss a:hover {
text-decoration:underline;
}
.rss img {
margin:-3px 0 -3px 6px;
border:none;
}
.menu_nav {
margin:0 auto;
padding:44px 0 0;
height:33px;
float:right;
}
.menu_nav ul {
list-style:none;
padding:0;
height:33px;
float:left;
}
.menu_nav ul li {
margin:0;
padding:0 8px;
float:left;
border-right:1px solid #88a9c3;
}
.menu_nav ul li a {
display:block;
margin:0;
padding:8px 16px;
font-size:13px;
line-height:17px;
font-weight:normal;
color:#fff;
text-decoration:none;
text-transform:none;
text-align:center;
}
.menu_nav ul li.active a, .menu_nav ul li a:hover {
text-decoration:none;
color:#fff;
background:#b53333;
}
.content {
padding:0;
}
.content_resize {
margin:0 auto;
padding:24px 0 40px;
width:960px;
}
.content .mainbar {
margin:0;
padding:0;
float:right;
width:684px;
}
.content .mainbar h2 {
margin-bottom:0;
padding-bottom:8px;
font-size:26px;
line-height:1.2em;
color:#14458e;
}
.content .mainbar div.img {
padding:12px 0 0;
float:left;
width:179px;
}
.content .mainbar img {
}
.content .mainbar img.fl {
margin:0;
border:0.5px none #6d6d6d;
}
.content .mainbar .article {
margin:0 0 8px;
padding:6px 20px;
}
.content .mainbar .post_content {
float:left;
width:440px;
}
.content .mainbar .post_content strong {
color:#6d6d6d;
}
.content .sidebar {
padding:0;
float:left;
width:260px;
}
.content .sidebar .gadget {
margin:0 0 16px;
padding:12px 20px 24px;
background-color: #5389c2;
}
.content .sidebar h2 {
margin:-12px -20px 12px;
padding:12px 20px 8px;
color:#fff;
background-color: #b53333;
}
ul.sb_menu, ul.ex_menu {
margin:0;
padding:0;
list-style:none;
color:#88a9c3;
}
ul.sb_menu li, ul.ex_menu li {
margin:0;
border-bottom:1px solid #88a9c3;
}
ul.sb_menu li, ul.ex_menu li {
padding:8px 0;
width:220px;
}
ul.sb_menu li a {
color:#fff;
text-decoration:none;
margin-left:-16px;
padding:4px 8px 4px 16px;
font-weight: bold;
}
ul.ex_menu li a {
font-weight:normal;
color:#fff;
text-decoration:none;
}
ul.sb_menu li a:hover, ul.ex_menu li a:hover {
color:#b53333;
font-weight:bold;
text-decoration:none;
}
p.spec {
padding:0 0 16px;
}
p.infopost {
margin:0 0 8px;
padding:6px 12px;
color:#fff;
background:url(../images/infopost2.gif) no-repeat left top;
}
p.infopost a {
padding:0 2px;
text-decoration:none;
font-weight:bold;
color:#fff;
}
p.infopost a:hover {
text-decoration:underline;
}
p.infopost span.date {
color:#fff;
}
.content p.pages span, .content p.pages a {
display:block;
float:left;
margin:0 4px 0 0;
padding:7px 0;
width:32px;
text-decoration:none;
text-align:center;
background:url(../images/page_p.gif) no-repeat left top;
}
.content p.pages span, .content p.pages a:hover {
color:#fff;
background:url(../images/page_a.gif) no-repeat left top;
}
.content p.pages a {
color:#6d6d6d;
border:none;
}
.content p.pages small {
font-size:12px;
float:right;
}
.content .mainbar .comment {
margin:0;
padding:16px 0 0 0;
}
.content .mainbar .comment img.userpic {
border:1px solid #dedede;
margin:10px 16px 0 0;
padding:0;
float:left;
}
.subpage .mainbar .sb_menu li a:hover {
color:#88a9c3;
text-decoration:underline;
}
.fbg {
padding:0;
background:#b53333;
}
.fbg_resize {
margin:0 auto;
width:920px;
padding:16px 20px;
color:#fff;
}
.fbg h2 {
color:#fff;
padding-bottom:24px;
font-size:24px;
}
.fbg img.gal {
margin:0 8px 8px 0;
padding:0;
border:4px solid #ece7e7;
}
.fbg .col {
margin:0;
float:left;
}
.fbg .c1 {
padding:0 16px 0 0;
width:280px;
}
.fbg .c2 {
padding:0 36px 0 16px;
width:280px;
}
.fbg .c3 {
padding:0 0 0 16px;
width:274px;
}
.fbg .fbg_ul {
margin:0;
padding:0;
list-style:none;
}
.fbg .fbg_ul li {
margin:0;
padding:0;
list-style:none;
}
.fbg .fbg_ul li a {
display:block;
margin:0;
padding:2px 0 2px 12px;
color:#666464;
text-decoration:none;
background:url(../images/li.gif) no-repeat left center;
}
.fbg .fbg_ul li a:hover {
color:#88a9c3;
text-decoration:underline;
}
.fbg p.contact_info {
line-height:1.8em;
}
.fbg p.contact_info a {
color:#fff;
text-decoration:underline;
font-weight:normal;
}
.fbg p.contact_info span {
display:block;
float:left;
width:74px;
font-weight:bold;
}
ol {
list-style:none;
}
ol li {
display:block;
clear:both;
}
ol li label {
display:block;
margin:0;
padding:16px 0 0 0;
}
ol li input.text {
width:480px;
border:1px solid #c0c0c0;
margin:0;
padding:5px 2px;
height:16px;
background-color:#fff;
}
ol li textarea {
width:480px;
border:1px solid #c0c0c0;
margin:0;
padding:2px;
background-color:#fff;
}
ol li .send {
margin:16px 0 0 0;
}
.searchform {
padding:0;
float:left;
}
#formsearch {
margin:0 0 16px;
padding:24px 20px;
width:auto;
height:30px;
background:#5389c2;
}
#formsearch span {
display:block;
margin:0;
padding:0;
float:left;
background:url(../images/search_bg.gif) no-repeat left top;
}
#formsearch input.editbox_search {
margin:0;
padding:7px 10px;
float:left;
width:171px;
font-size:12px;
line-height:16px;
color:#a8acb2;
background:none;
outline:none;
border:none;
}
#formsearch input.button_search {
margin:0;
padding:0;
border:none;
float:left;
}

PAR AVANCE MERCI BEAUCOUP POUR VOTRE AIDE !