Have you been making any updates to this since you posted? When I view this in IE6 and Chrome I get a very similar result. I'm including some screen shots of what I got for your reference.
The only differences that I can see are the height of the menu in IE6, it is a little short, and the images that differentiate the different links, they seem to be missing in IE6.
Are you testing this with a native IE6 or a tester tool? I tested with a native installation of IE 6 on Win XP.