Original Source is hereQuote:
Microsoft has quietly released 32-bit Windows 2003 Service Pack 2 for download. (The 64-bit edition is still showing as a release candidate on the site.) The installation of SP2 may potentially regress hotfixes that have been deployed previously; Microsoft has released a script to scan for hotfixes that may potentially regress.
I guess we have been under estimating there sneakyness. ;)