Microsoft has released the following updates: Update for Windows Server 2008 x64 Edition (KB2569391), Update for Windows Server 2008 (KB2569391), Update for Windows Server 2008 for Itanium-based Systems (KB2569391), Update for Windows 7 for x64-based Systems (KB2546868), Update for Windows Vista (KB2569391), and Update for Windows 7 (KB2546868)

KB2546868: You cannot use interactive TV functions in Windows Media Center on a Windows 7-based computer
Assume that you use Windows Media Center to watch interactive TV on a Windows 7-based computer. You input a correct password in Windows Media Center. In this situation, the mouse pointer and the color settings button do not work correctly. Therefore, you cannot use interactive TV functions.

KB2569391: IPv6 DAD state does not switch back to Preferred state from Deprecated state in Windows Vista, in Windows Server 2008, in Windows 7, or in Windows Server 2008 R2
Assume that you use an IPv6 address on a computer that is running Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2. If the IPv6 address falls into Deprecated state under certain situations (for example, no router advertisement (RA) message is received on the computer within the preferred lifetime), the IPv6 Duplicate Address Detection (DAD) state does not switch back to Preferred state even if the situations are resolved.

Update for Windows Server 2008 x64 Edition (KB2569391)
Update for Windows Server 2008 (KB2569391)
Update for Windows Server 2008 for Itanium-based Systems (KB2569391)
Update for Windows 7 for x64-based Systems (KB2546868)
Update for Windows Vista (KB2569391)
Update for Windows 7 (KB2546868)