Browser Compatibility Websites

List of CSS1 and CSS2 bugs in other Internet Explorer, Netscape, Opera versions, and a bug-by-bug guide on how to avoid them.

Groups properties by level of support. Contains guide, tutorials, and articles.

Teaches how to produce Web pages (formatted with Cascading Style Sheets Level 1) that display attractively on modern browsers and adequately on recent ones.

Wiki companion to the CssDiscussList mailing list. Includes tips and tricks and information on browser hacks, text sizing, and testing.

A list of CSS bugs in various browsers for various platforms. Some include demonstrations and screenshots, and workarounds.

Tests of CSS2 and CSS3 selectors, pseudoclasses and declarations, including compatibility information for Explorer, Mozilla, Safari, and Opera.

Code for a Internet Explorer attached behavior which, that allows IE to recognize and display a number of CSS3 properties. Site includes download, documentation, a user forum, and online demonstrations.