The problem isn't Firefox vs. IE (though it's mostly the old IE browsers where the problem lies), it's that older browsers are compliant with the current CSS standards.
I set it up real quick there to change the display property on the entries depending on whether or not you're hovering over the body of the page. It's not a complete layout by any means (all I did was add a picture and resize the entry area) but I think it gets the demonstration across?