Microsoft has released the first update for Windows 7 and Windows Server 2008 R2. It fixes application compatibility problems some users have been experiencing.
Full Story: http://arstechnica.com/microsoft/news/2009/09/windows-7-application-compatibility-update-for-august-2009.ars
Full Story: http://arstechnica.com/microsoft/news/2009/09/windows-7-application-compatibility-update-for-august-2009.ars