http://scriptcrest.com/kizugawa/html/03/15.html (in Japanese) in IE, text is nice and wrapping around the images, but FF is pushing it down...
You might be able to pass with just adding align='left' to all your image tags within the 'bottomcontent' div. Theoretically, it should be able to fix the wrap problem. Also, did you know that your mouse-overs blink when used in I.E.? If you want to pm me, I can tell you a real easy way to fix that with CSS.