DevDiv SE released one non-security update today as part of the monthly non-security refresh:

.NET Framework 3.5 Service Pack 1 Update (KB982524, KB956250, KB982525, KB982526)
Affected products/components: .NET Framework 3.5 SP1

The update has a couple of different KB articles depending upon what your target platform (OS and SP level) is.

Windows XP, Windows Server 2003: KB982524
Windows Vista SP1: KB956250
Windows Vista SP2: KB982525
Windows 7, Windows Server 2008 R2: KB982526

Thanks,
Jamshed Damkewala
Senior Lead Program Manager, DevDiv Sustained Engineering Team