MarketPress display problems in IE

I have just finished setting up a MarketPress driven eStore for my existing Wordpress site. It seems to work great in Firefox, Safari and Opera, but does not display properly in Internet Explorer.

The product image, title and descriptions line up nicely in grid fashion, but the price and add to cart button are skewed to the left??

Any thoughts and ideas on how to fix? I am not a programmer but am comfortable with basic (well guided) CSS edits.

Thanks in advance