I have a work in progress site I am putting together. Within the main header, I have two sets of navigation, one that is on the bottom and one that is on the top.
here is a shot of what i want it to look like (this is accomplished by setting the red to a margin-left:-340px; - which i don't want to do): http://i34.tinypic.com/d8dgg.png
I haven't found any issue as you specified in the url (http://i37.tinypic.com/2hycdc1.png). It looks good in browsers IE6, FF & Windows Safari. Let me know if I missing anything.
FYI: I'm using Win XP with the screen res.1280 by 1024 pixels.