RichInStyle.com: CSS bug guide - List of CSS1 and CSS2 bugs in other Internet Explorer, Netscape, Opera versions, and a bug-by-bug guide on how to avoid them. WestCiv - CSS1 and CSS2 Browser Support - Groups properties by level of support. Contains guide, tutorials, and articles. Cascading Style Sheets Level 1 Browser Incompatibilities - Teaches how to produce Web pages (formatted with Cascading Style Sheets Level 1) that display attractively on modern browsers and adequately on recent ones. CSS-Discuss - Wiki companion to the CssDiscussList mailing list. Includes tips and tricks and information on browser hacks, text sizing, and testing. CSS Pointers Group: CSS Bugs and Workarounds - A list of CSS bugs in various browsers for various platforms. Some include demonstrations and screenshots, and workarounds. QuirksMode: CSS Contents and Browser Compatibility - Tests of CSS2 and CSS3 selectors, pseudoclasses and declarations, including compatibility information for Explorer, Mozilla, Safari, and Opera. CSS3 PIE - 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.