The IE team has been very hard at work on IE 8 for the past several months and they hit a huge milestone last Friday evening. The IE dev team checked in a bunch of code that included several new features implemented in the core rendering engine that enable IE to pass the ACID 2 test! This is great news for web developers: IE 8 is going to be our most standards compliant browser to date. Passing ACID 2 is really a combined side effect of all the new features that have been developed for IE 8.
What is ACID 2 test? Acid2 is one test of how modern browsers work with some specific features across several different web standards.