I've gotten quite a few emails lately on how a DHTML script (whether on DD or elsewhere) or CSS code not quite working properly in the new IE8 beta 2 browser that was released a few days ago. For example, if you test out CSS Chrome Menu in IE8 beta, it currently fails.
We plan on checking all scripts on DD for IE8 once it's officially released (or dangerously close to), when all the dust have settled in terms of changes to the browser's rendering engine. In the meantime, to get pages on your site that don't function properly in IE8 beta, the quickest way is just to add the IE7 mode meta tag to the HEAD of your page:
This META tag causes IE8 to utilize IE7's rendering behavior while still mantaining all IE8 features.
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />