Hmmm, doesn't look to me like it's a problem there. From what I can tell, all tags and divs are opened and closed. Not sure what else to offer at this point, but it doesn't look like that file is the issue. Someone else might contradict me on that, maybe I missed something, but I don't think so.
I have a sneaking suspicion it might be CSS related. Something may be floating the wrong way and not cleared properly comes to mind.