DIV Won't change when width is changed in IE

site: http://madclassifieds.000k.net/library/
css: http://madclassifieds.000k.net/library/css/main.css

On div.nav, when I change the width for IE (* html div.nav), it doesn't change anything. I tried setting the width to 11 and it still won't shrink down. I need to make it skinnier so it will line up with the line in the header.

It had something to do with the content I had.