You have a few errors in your html and 4 "real" errors in your css.
The worst errors in the html are putting a div tag inside a p tag several times and the rest are related to poor embedding practices of your SWF.
The css error that might be affecting IE is that you are using bad lengths in the padding (see css errors).
<div class="headline clearfix">
doesn't exist... it would be
you probably want it to be "headline," I'm pretty sure.
PLEASE validate your HTML & CSS before posting.... you could find a lot of problems yourself just by doing that. oh, and there is a Sticky Note in the forum about that.