Windows Server 2003
REG_EXPAND_SZ is a null-terminated string that contains unexpanded references to environment variables. (For example, %PATH% is one such environment variable.) Whether REG_EXPAND_SZ becomes a Unicode string or an ANSI string depends on whether you use the Unicode or ANSI functions. You can use the ExpandEnvironmentStrings function to expand the environment variable references.
The issue may cause function failure of your scripts or applications if you use the reg.exe utility to query registry key with the REG_EXPAND_SZ type.
Windows Server 2008
943070 Authentication may fail, or you may receive an 807 error or a 691 error, when you try to connect to the Network Policy Server on a Windows Server 2008-based server
I asume the Windows 2008 patch is a post RTM patch?
Alan, the KB article 943070 is not a hotfix KB article, instead, it mentions an issue occur with Windows Server 2008.
So, we cannot say it is a post RTM patch. :)