Difference IE6 et le reste

Salut à tous,
J'ai un souci de CSS a priori.
Je pose 2 screen, u prit sous ie6 et l'autre sur FF (résultat équivalent sur IE7 & chrome).
Vous pourrez remarquer que l'un est décalé du haut de ma page et que le second non.
Je souhaiterai donc que dans les 2 cas le menu soit collé en haut de page.
Voici le CSS général :

Code:

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body
{
    margin:0;
    padding:0;
    background:#dae0e5 url('/img/background.png') repeat-x 50% ;
    font-family:Verdana;
}
 
#header
{
    width:100%;
    height:150px;
    z-index:0;
}
 
#main
{
    width:100%;
    height:500px;
    z-index:0;
}
 
#footer
{
    width:100%;
    height:100px;
}
 
#login
{
    width: 18em;
    padding: 20px;
    margin:0 auto;
    background:#E6E6E6;
    color:#000
}

le css du menu

Code:

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#page
{
    position:absolute;
    margin:0px;
    padding:0px;
    width: 100%;
}
 
#menu
{
    position: relative;
    margin-left: 250px;
    height:110px;
}
 
.gallery
{
    margin:0px;
    margin-top: 40px;
    width: 732px;
    text-align:center;
}
 
.menuitem
{
    background: #afec77;
}
 
.menutarget
{
    background-color:#ecf1f4 ;
    display: none;
    border-bottom: 2px solid white;
    border-left: 2px solid white;
    border-right: 2px solid white;
}
 
img
{
    border:0px;
}
 
.gallery ul li
{
    padding:0px;
    margin:0px;
    display:inline;
    list-style-type:none;
    margin-right:20px;
}
 
.gallery ul li a
{
    color:#576c82;
    font-size:14px;
    text-decoration:none;
}
 
.gallery ul li a:hover
{
    color:#90a0b0 ;
    text-decoration:underline;
}

et pour finir le squelette html de ma page :

Code:

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<body>
<div id="container">
<div id="page">
    <div id="menu" >
        <div id="item_atelier" class="menutarget">
            <div class="gallery" >
                <ul>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Cr&eacute;ation S.E.</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Cr&eacute;ation S.E.C.</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Lancement Production</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Recherche</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Tests S.E.</a></li>
                </ul>
            </div>
        </div>
        <div id="item_labo" class="menutarget">
            <div class="gallery">
                <ul>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Cr&eacute;er un Eqt.</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Rechercher un Eqt.</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Tester un Eqt.</a></li>
                </ul>
            </div>
        </div>
        <div id="item_lots" class="menutarget">
            <div class="gallery">
                <ul>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Cr&eacute;er un lot</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Rechercher un lot</a></li>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Tester un lot</a></li>
                </ul>
            </div>
        </div>
        <div id="item_livraison" class="menutarget">
            <div class="gallery">
            Test
            </div>
        </div>
        <div id="item_sav" class="menutarget">
            <div class="gallery">
            Test
            </div>
        </div>
        <div id="item_stock" class="menutarget">
            <div class="gallery">
            Test
            </div>
        </div>
        <div id="item_admin" class="menutarget">
            <div class="gallery">
                <ul>
                    <li><a href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#" target="_blank">#</a>">Utilisateurs</a></li>
                </ul>
            </div>
        </div>
        <a id="atelier" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#atelier" target="_blank">#atelier</a>" rel="e24menuitem[item_atelier]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/atelier.gif" target="_blank">img/atelier.gif</a>" alt="Atelier Sous-Ensemble" /></a>
        <a id="labo" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#labo" target="_blank">#labo</a>" rel="e24menuitem[item_labo]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/labo.gif" target="_blank">img/labo.gif</a>" alt="Labo Techniciens" /></a>
        <a id="lots" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#lots" target="_blank">#lots</a>" rel="e24menuitem[item_lots]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/lots.gif" target="_blank">img/lots.gif</a>" alt="Lots de cartes" /></a>
        <a id="livraison" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#livraison" target="_blank">#livraison</a>" rel="e24menuitem[item_livraison]" ><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/livraison.gif" target="_blank">img/livraison.gif</a>" alt="Livraison" /></a>
        <a id="sav" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#sav" target="_blank">#sav</a>" rel="e24menuitem[item_sav]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/sav.gif" target="_blank">img/sav.gif</a>" alt="S.A.V." /></a>
        <a id="stock" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#stock" target="_blank">#stock</a>" rel="e24menuitem[item_stock]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/stock.gif" target="_blank">img/stock.gif</a>" alt="Stock" /></a>
        <a id="admin" href="<a href="http://www.developpez.net/forums/view-source:http://gwprod/#admin" target="_blank">#admin</a>" rel="e24menuitem[item_admin]"><img src="<a href="http://www.developpez.net/forums/view-source:http://gwprod/img/admin.gif" target="_blank">img/admin.gif</a>" alt="Administration" /></a>
    </div>
</div>    <div id="header"><p style="font-size:48px;">Test</p></div>
    <div id="main">Test</div>
    <div id="footer">Test</div>
    </div>
</body>

J'avoue que je peine à trouver une solution seul alors je remercie d'avance les grandes âmes charitables de ce forum !