sonunigam (Love Geek): Internet Explorer 5.0 for the Macintosh, shipped in March 2000, was the first browser to have full (better than 99 percent) CSS1 support, surpassing Opera, which had been the leader since its introduction of CSS support 15 months earlier. Other browsers followed soon afterwards, and many of them additionally implemented parts of CSS2. As of August 2010[update], no (finished) browser has fully implemented CSS2, with implementation levels varying (see Comparison of layout engines (CSS)). *
04-01-11 - 01:15:56

sonunigam (Love Geek): Even though early browsers such as Internet Explorer 3 and 4, and Netscape 4.x had support for CSS, it was typically incomplete and afflicted with serious bugs. This was a serious obstacle for the adoption of CSS. *
04-01-11 - 01:16:26

sonunigam (Love Geek): When later 'version 5' browsers began to offer a fairly full implementation of CSS, they were still incorrect in certain areas and were fraught with inconsistencies, bugs and other quirks. The proliferation of such CSS-related inconsistencies and even the variation in feature support has made it difficult for designers to achieve a consistent appearance across platforms. *
04-01-11 - 01:17:26

sonunigam (Love Geek): Some authors resorted to workarounds such as CSS hacks and CSS filters to obtain consistent results across web browsers and platforms. *
04-01-11 - 01:18:01

sonunigam (Love Geek): Problems with browsers' patchy adoption of CSS along with errata in the original specification led the W3C to revise the CSS2 standard into CSS2.1, which moved nearer to a working snapshot of current CSS support in HTML browsers. Some CSS2 properties that no browser successfully implemented were dropped, and in a few cases, defined behaviors were changed to bring the standard into line with the predominant existing implementations. *
04-01-11 - 01:18:31