Windows 32bit Family XP RTM - 5.1.2600
XP SP1a - 1106
XP SP2 - 2180
Server 2003 RTM - 5.2.3790
Server 2003 SP1 - 1830
Server 2003 SP2 - 3959
Vista RTM - 6000.16386
Server 2008 Beta 3 - 6001.16510
Windows 64bit Family XP 64bit RTM - 5.2.3790.1830
XP 64bit SP2 - 3959
Server 2003 64bit RTM - 5.2.3790.1830
Server 2003 64bit SP2 - 3959
Vista 64bit RTM - 6000.16386
Server 2008 64bit Beta 3 - 6001.16510
As some of you may have noticed, there was some confusion/concern regarding the validity of the unusual Build 5503 of XP SP3 that made the news a few days ago. Fortunately, Mary Jo Foley received the following update from Microsoft last night:
The XP SP3 5503 build was a minor interim build released to address one specific issue for a subset of private beta testers. This build was not intended for public release and anyone who has that build and is not part of the private beta is working with bits that Microsoft can’t verify the integrity…. The final version of XP SP3 is still on target to be released the first half of calendar year 2008.
Also worth noting is that the build contains an EULA for "Pre-Release" software so it most definitely will not be the final SP3 build.