Problem centering map

[Davud]

Hi,
I can see my default location actually in center of map using chrome browser and this is my code :

var DefaultLatitude = 38.08013;
var DefaultLongitude = 46.28503;
var defaultZoomLevel = 16;

.....

var mapOptions =
{
    baseMapType: nokia.maps.map.Display.NORMAL,
    center: new nokia.maps.geo.Coordinate(DefaultLatitude, DefaultLongitude),    
    zoomLevel: defaultZoomLevel,
    components: [
		new nokia.maps.map.component.ZoomBar(),
		new nokia.maps.map.component.Behavior(),
		new nokia.maps.map.component.Overview(),
		new nokia.maps.map.component.ScaleBar(),
		new nokia.maps.map.component.ContextMenu(),
        infoBubbles = new nokia.maps.map.component.InfoBubbles()
	]

        .......

        var mapContainer = document.getElementById('map_canvas');
        map = new nokia.maps.map.Display(mapContainer, mapOptions);

    ......

    <style>
    .MapHolder
    {	
	background: none repeat scroll 0 0 #F5F5F5;
	border: 1px solid #DADADA;
	padding: 0px 0px 0px 0px;		
    }
    </style>
    <div id="_DivMapHolder" class="MapHolder">
        <div id="map_canvas" style="height: 100%;">
        </div>
    </div>
}

But with Firefox and IE the map is not centered ! (the center shifted to the left)
The other controls such as ZoomBar, ScaleBar, ... are in true place in both Chrome and Firefox .

How can i fix this problem ?
Tanx