In the first build of the demo app, you will notice that Amit builds the solution, and then tries to run it. But a dialog pops up that says the application is not up to date. [EVEN THOUGH HE JUST BUILT THE SOLUTION] He quickly rebuilds it again, and runs the application.
This is a long standing bug that many people have mentioned as a flaw in Visual Studio C++.
It is not a show stopper, but it deserves to be investigated and fixed before 2010 is released for two reasons:
1) If you leave it in, then developers will be discouraged from reporting errors.
2) It can't be that hard to fix.
If I had to guess, I would look at the situation in which dependent files were created in the same minute as the source files.