Blog articles formatted wrong in IE7/IE8

Hi Guys,

Having a problem with my articles on my site. The articles are loading and looking fine in both Firefox and Google Chrome, but not in IE7 and 8.

Check out one of the articles here. In Internet Explorer for some reason the containing Div doesn’t contain the article content and stops after the ads on the right whilst the rest of the article continues down the page past my footer.

I’m a real noob so my HTML / CSS is pretty messy (i’m trying to improve!) and at first thought this was simply because I hadn’t cleared my floats, but this hasn’t helped either. I can’t give the containing Div a specific height as all my articles are different sizes, so it’s set at height: auto; and this seems perfectly fine in Firefox and Chrome.

Any help would be massively appreciated.