Microsoft have released Windows 2003 Service Pack 2. It's worth downloading and testing to ensure that you can integrate it into your server build process as soon as possible.

If this release follows Microsoft's standard practice of current minus one then Windows 2003 gold (i.e. no service pack) will no longer be supported for security updates.

For the really curious there is a in this service pack.

tech note in the Microsoft Knowledge base that details all the fixes