Why is there a gap in between two divs and no overlap

[Kirill]

I've come here before with great results and appreciate the help. I've been searching and searching through my code to figure out what is going on and I can't quite get it. At my site http://www.hirelogo.com underneath the navigation there is a random space insert. I've removed div ".top" as I thought maybe that was causing the issue, but this is not to my knowledge. I've been dissecting with firebug, but find no overlap issues that may cause this. The area of random space I'm referring to is below the navigation "home,design team..ect" and the "step1, step 2 graphic" . I hope someone give me a little nudge to whats going on here. Thanks