When we started planning IE9, we recognized the need for a better feedback loop with developers. The developer community was clear that they wanted pre-release builds of the browser platform in a consistent rhythm, with a good feedback mechanism.

Seven weeks ago at the MIX Conference, we released the first IE9 Platform Preview. We committed to updating the Preview approximately every eight weeks. Today, we�re releasing the second Platform Preview of Internet Explorer 9, available now at www.IETestDrive.com.

Today�s release builds on the first Platform Preview, delivering improvements to IE9�s performance, support for standards, and hardware acceleration of HTML5. We�ve also updated the test drive site with a new set of developer samples to show what developers can do with GPU-powered HTML5. As part of our commitment to enabling developers to use the Same Markup � the same HTML, CSS, and script � on the web, we have contributed many new tests to the W3C for HTML5, as well as CSS3 Media Queries and DOM. The Developer Tools in this preview include some new features to make finding and fixing markup issues easier.