Microsoft is urging users not to run leaked beta versions of its forthcoming MSN Messenger Version 6 instant messaging application because the software is not ready for consumer use.Microsoft\u00a0is urging\u00a0users not to run leaked beta versions of its forthcoming MSN Messenger Version 6 instant messaging application because the software is not ready for consumer use.Early versions of MSN Messenger 6 have popped up on dozens of Web sites and new sites spring up every day. Microsoft said the versions that are offered on the Web are meant for internal testing only and that it does not know who leaked the software."We had intended for the beta to be an internal beta only. MSN strongly discourages users from downloading a beta from unauthorized sites due to concerns about the stability of the code and lack of complete information," Microsoft's MSN unit said in a statement sent via e-mail Friday.Microsoft has asked individual Web sites offering the beta for download to pull the software, Larry Grothaus, lead product manager for MSN said. Users should be patient and wait for the "public preview" of the application that is due out in the next couple of weeks, he said.Still, Microsoft is thrilled about the popularity of the beta software: more than\u00a02 million people have downloaded the leaked versions, according to a memo sent Thursday to the MSN team by Blake Irving, corporate vice president of the MSN & Personal Services Division, MSN Communications and Merchant Platform group at\u00a0Microsoft."(MSN Messenger version) 6 is fast becoming one of the most addictive services we've ever created," Irving wrote. "Anyone that has used V6 knows why it's a winning service ... I don't think the industry will have seen such a thing since ICQ got big years and years ago."ICQ, launched in 1996, is one of the first Internet instant messaging tools. It was developed in Israel by Mirabilis\u00a0and is now owned by AOL. ICQ was popular, especially in the late 1990s.MSN Messenger 6 promises improvements to the user interface, new personalization features, integrated online gaming and built-in voice and video chat features. The final version of MSN Messenger 6 should be out "a couple of months" at most after the public preview becomes available in the coming weeks, Grothaus said.Microsoft offers a preview of what MSN Messenger 6 will look like on its Web site. To see it, click\u00a0here.