I just checked errors on the amazon.com site. The opening page has more than 1400 errors! The other commercial sites that do work well, when I checked them they all had under 400. That's a pretty big difference. It sounds like Amazon is not trying too hard to smooth our web experience.

And in the vein of what kilmar notices, the Amazon count is around 300 elements.

Too bad, I'm a huge Amazon customer, but I guess they don't really want me.