http://blogs.msdn.com/b/jesse_collins/archive/2009/05/30/security-research-defense.aspxI'm embarassed that I've only recently stumbled across Microsoft's "Security Reserach & Defense" blog: http://blogs.technet.com/srd/ It has some great information for what kinds of fixes are being shipped in updates and why. For example, this posten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)