The JA Larix template is provided as demo template in the eCommerce edition of VirtueMart. With IE8 the cart module in the page header is displaced to the left of the page. This can be fixed:
Look in the ja_larix template folder /components/com_virtuemart/themes/ja_larix/
Find the index.php file
In the <head> code change the IE filter to
<!--[if lte IE 6]>
<style type="text/css">
.clearfix {height: 1%;}
</style>
<![endif]-->
<!--[if IE 7.0]>
<style type="text/css">
.clearfix {display: inline-block;}
</style>
<![endif]-->
<!--[if gte IE 8.0]>
<style type="text/css">
.clearfix {height: 1%;}
</style>
<![endif]-->
There are further IE8 related issues - the fix for most is to put the following in the index.php head code:
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />