Amazon.com has been flogged a few times for it's weird use of "tabs" in it's design that don't really act like tabs. Well now we can start flogging it for all new reasons. They have gone with a really busy, really blocky design with a flyout pop-up menu for the main navigation. Seems like a questionable move to me, but we'll see how the rest of the world reacts.
Perhaps most questionable is their sticking with table based design. What is this, 1997?