FireFox bandwagon

Sorry maybe I should of said worst mainstream browser ever made. Hell even Netscape interprets code better then IE6, and has a better box model. Tell me how you screw something up this badly?

http://upload.wikimedia.org/wikipedia/commons/thumb/6/64/W3C_and_Internet_Explorer_box_models.svg/300px-W3C_and_Internet_Explorer_box_models.svg.png