I'm posting this as a BIG CAVEAT to everyone. I know it's not a standard Q&A, but I think this is something every Windows admin should know. There is a very real risk of falling into Big Troubles.
Microsoft has recently released
Windows Management Framework 3.0 for Windows Server 2008 and Windows Server 2008 R2 systems, which includes some nice things native to Windows Server 2012 (like PowerShell 3.0) and lots of improvements to WMI, WinRM and other management technologies.
Windows Update is advertising it as an optional update.
Should I install it on my servers?
Update: As of 2012-12-19 Microsoft has removed the update from Windows Update after major compatibility issues with various products (including the ones being discussed here) have been reported by multiple users.