Something else I noticed using IE7
The page keeps flashing on the screen after loading.
also FF shows the following errors:
<!-- end of content --></div> (unexpected)
Code:
div id="top-bottom"><img src="/fileadmin/images/green-bottom.gif" alt="" /></div>
duplicate div on the page it seems the footer has the most errors as duplicated div id's (change to class instead if you are going to use the CSS style more than once)
check this out, might help:
blacknightvps.com | SEO Website Analyzer Project