A site looks different in Internet Explorer 9

I'm trying to put some small ads on my page. 开发者_开发技巧They are showed in Firefox and Chrome, but not in IE9. Do you have an idea why?

I haven't tried it in other browser, if you have sometething else (e.g., Safari), it would be great if you could tell me the result. The webiste is Studentensport.at. There should be 5 small ads at the bottom of the page.

Could it have something to do with this:

<img width=""

in your image tags? I can see the five divs when I select them, but they're very thin.

Edit. It is. If you explicitly set the height and width or remove the height and width it works.