既出？1.01にあがってる
http://www.microsoft.com/downloads/details.aspx?FamilyID=272be09d-40bb-49fd-9cb0-4bfa122fa91b&DisplayLang=en

*What is different about Visual C++ Toolkit 2003 version 1.01 from version 1.0?
The Visual C++ Toolkit 2003, version 1.01 (released July 6, 2004) supplants version 1.0
(released April 16, 2004). Version 1.01 updates the included Visual C++ compiler to exactly
match the compiler that ships with Visual Studio .NET 2003 (build 13.10.3077).
In the initial 1.0 Toolkit release, the build numbers of the compilers differed slightly.
Version 1.01 of the Toolkit also corrects some minor grammatical issues in the sample
whitepapers and in the command prompt window.

*If I already have the Visual C++ Toolkit 2003 version 1.0, should I download 1.01?
There are no compilation-related behavior changes in the Toolkit version 1.01 from version 1.0.
If you decide to install version 1.01 you should first uninstall version 1.0 using the Add or
Remove Programs control panel.