[TYPO3-english] On shift-refresh, Page shifts right and then left

[Dave Kennedy]

Hi,
http://www.dksy.net/bbd/typo3-dummy/home.html

This page shifts right and then left when refreshed with shift-refresh.
It seems to be related to the header image.
If the header is removed the page does not shift
        <div id="header">
            <div id="logo">
                <a href="home.html"> <img src="extfiles/images/bbd-www.jpg"
border="0" alt="BBD"></a>
            </div>
        </div>
Any help would be greatly appreciated.
Thanks

#header
{
    position: relative;
    height: 150px;
}

#logo
{
    position:absolute;
}