Things we know: Microsoft has an Internet Explorer event scheduled for September 15th, Microsoft has released four developer previews of Internet Explorer 9, IE 9 beta is set to launch in September and in all likelihood will be unveiled at the 9/15 gathering. Things we don’t know: what IE 9’s interface will look like. However, thanks to Microsoft’s Russian press site, we may have a better idea of what we are in-store for. ZDNet found the screen shot above sitting on the Redmond software giant’s Russian web site. The screen capture shows a sleeker, less cluttered, dare we say more mature, version of IE. The shot depicts a unified search and address bar and the Russian site said the whole look and feel of the browser has been simplified. When contacted for comment, the company had this to say: “Microsoft is encouraged by the early enthusiasm around Internet Explorer 9; we have nothing further to share about Internet Explorer 9 at this time.” Guess we’ll just have to wait until the 15th.