I am having an issue with IE9 in terms of the icons and ratings stars in AF.  In Firefox, everything is displayed correctly in IE9, not so much, although it is fine in compatibility mode.  I have attached screenshots from both systems (as links, inserting images doesn't seem to work).

Try adding these to your skin.css

#af-rater {height: 16px;}
td.af-forumdetail table tbody tr td.afnormal {min-width:100px;}

If this doesn't work, I will probably have to actually look at your site.