In order to get that level of display control, they're doing some insane things under the hood with the HTML. It's a tag fiesta in there (understandably -- ther

In order to get that level of display control, they're doing some insane things under the hood with the HTML. It's a tag fiesta in there (understandably -- there's no other way to do it), and complex HTML can put some real demands on the processor -- but nothing compared to the same content in Flash. In Safari scrolling that document is very smooth. So much better than the Flash Scribd. Kudos.