A new KB article (2791765) has been releases regarding application compatibility on Windows Server 2008 R2 and Windows 7.
“…The Windows application compatibility update is a software update that improves the compatibility experience in Windows 7 and in Windows Server 2008 R2. Microsoft regularly releases Windows compatibility updates to improve the overall user experience.
For more information, refer to the "Applications or devices that experience a change in behavior after you install this update" section and the "Applications and devices that are included in this update" section…”
Source and download: http://support.microsoft.com/kb/2791765/en-us?sd=rss&spid=14134