I stumbled on this great website following some links on the HTML5 default style sheet used by supporting browsers. The information provided here are really useful and serve as a quick start for testing CSS styles in various versions of Internet Explorer. Versions 6, 7, 8 and 9 are all reviewed. Further, this site provides also information on Firefox, Webkit and Opera default style sheets. This is useful, because sometimes we need to rely on browser default styles to render certain elements, such as paragraphs or lists.