In late March 2010, a beta of Windows Live Essentials Wave 4 was leaked onto the internet and has since spread to various BitTorrent networks, which included a private beta build of Windows Live Messenger Wave 4. However, as the software was designed for private beta testing, non-beta testers cannot sign-in to this leaked build. The new software features a revamped interface which brings the “What’s new” section of Windows Live to the new “social pane”, similar to the way a social networking site presents updates. Among the new features are tabbed conversations, a redesign of the old emoticons, integration of Bing results, built-in video message support, HD video chat, in-line commenting of social updates, a new social photo viewer that supports commenting (for Facebook and SkyDrive photos), badges support, synchronised status updates, availability by categories, as well as integration with Facebook chat. However, several features had also been removed from the previous version, such as the removal of display names, handwriting tool, one-way webcam requests and import/export of instant messaging contacts feature. The “Wave 4” release of Windows Live Essentials, which includes Messenger, also dropped compatibility with Windows XP and only runs on Windows Vista or Windows 7. The new Windows Live Messenger for the iOS became available on the App Store on June 21, 2010, in addition to other mobile versions of Windows Live Messenger for Windows Phone, Blackberry, and Symbian mobile platforms. On June 24, 2010, a public beta of Windows Live Messenger Wave 4 was released as part of the new Windows Live Essentials beta. A “beta refresh” of Windows Live Messenger Wave 4 was released on August 17, 2010 as part of an upgraded Windows Live Essentials beta. The final version of Windows Live Messenger 2011 (Wave 4) was released on September 30, 2010. On the same date, a version of Windows Live Messenger for Zune also became available.