Microsoft’s unveiling of Internet Explorer 8 on Thursday was marred by news that the browser, touted to be its most secure ever, already has been hacked. The launch has also kicked off a new round of browser wars, with Google unveiling a new beta of its Chrome browser, and Mozilla releasing Fennec, the mobile version of its Firefox browser, in beta. IE8 was cracked at the 10th annual CanSecWest conference in Vancouver, Canada, Wednesday by a hacker who identified himself only as “Nils.”