I would like to point out that I hope there'll be a sidebar in the APG to explain the key differences between the Cavalier, Knight, and Paladin classes. I know Knight mechanics can't be mentioned due to it belonging to WotC, but the title, duties, and background is much different than that of a Cavalier and should be pointed out. It'll help ease confusion and probably stop the question of "Why wasn't this class called a Knight instead?" or to stop Cavaliers from calling themselves knights by accident.