As of templates and Browser quirks (in particular IE): Since I usually use FF for developing and test in IE afterwards, I was often shocken how the layout can differ. Until the day when I discovered that a simple <!DOCTYPE HTML> (without the 'usual' stuff in it) did the trick for me. This way I experienced pretty much identical results in the major 5 (FF, IE, Opera, Safari, Chrome) and Konqueror, especially in the newest versions.