My display's supposed to be really accurate (Samsung 215TW), but I'm also extraordinarily picky. I think if you just made the nav bg a tiny bit lighter, it'd do the trick.
I think those shirts on the bottom need to be smaller or be separated by something. There's a confusing hierarchy with this page since the thumbs and product graphics are roughly the same size. But the design overall is good, don't get me wrong. I'm just an ass.