1 px difference

Hi, I don’t know why, but, between firefox and IE there is a 1px difference in the vertical positioning of my page, if you have a suggestion on how to fix it, please say so. Here so you can see what I mean

http://voussurleweb.com/New%20Look/index.html

in Firefox I get the effect I want, it’s just flush
And in IE it’s one pixel too high