Bad news for window xp users.IE 9 refuses to work with window xp but who cares ?
IE 9 : Features News & Previews
Microsoft's Internet Explorer 9 Browser: FAQ
Microsoft's next-generation Internet Explorer 9 browser may not be anywhere close to competition, but you can test drive a "platform preview" of the software that provides a taste of IE9's capabilities. So what's the deal with Redmond's upcoming browser, and how does it differ from IE8 and worthy competitors such as Google's Chrome, Mozilla's Firefox, Opera Software's Opera, and Apple's Safari? Here's a quick primer.IE9 preview
In An Early Look At IE9 for Developers, Dean Hachamovitch, General Manager for Internet Explorer, reports on performance progress, web standards progress (border-radius, bits of CSS3, Acid 3 performance), and “bringing the power of PC hardware and Windows to web developers in the browser” (e.g. improved type rendering via Direct2D, a Windows sub-pixel rendering technology that replaces Cleartype).Internet Explorer 9: A Fresh Start, With HTML5
Ninth time's the charm, sometimes! At least that's Microsoft's hope with IE9, which they've just announced at Mix, brings new HTML5 support (including HTML5 video!), hardware-accelerated 2D graphics, and a totally new JavaScript engine—and no XP support.Platform Preview gives Web developers first taste of IE9
Microsoft today released the Windows Internet Explorer Platform Preview to the public. The release is meant to demonstrate the capabilities of Internet Explorer 9 to Web developers while at the same time providing feedback to the IE9 team. Microsoft says it is committed to updating the Platform Preview to keep a more effective rhythm for discussion, and it will be updated every eight weeks or so. Microsoft will share feedback with standards-setting bodies in addition to using it for internal development.The New IE9: More HTML5, CSS3 and No Windows XP
Today Microsoft released the developer preview of Internet Explorer 9. It’s the first look we’ve had at Microsoft’s flagship browser since it first revealed details late last year.