Then why are there 2 different versions, one signed as RTM (278 920 704 bytes, MD5 94276421fa963122a4e434d3b14fdc01) and one signed as KB... from the MS download servers (278 927 592 bytes, MD5 59a98f181fe383907e520a391d75b5a7)? There has to be something different about those 2, so I thought the later one (KB...) was for "public use" and distribution.