We automate builds with CruiseControl / NAnt and it has always worked with VS2005.
We recently upgraded to VS2010 and are now seeing several projects give a "Rebuild All" message, but nothing else:
------ Rebuild All started: Project: EventSetup, Configuration: BuildTWinWithPortalSvc Win32 ------
------ Rebuild All started: Project: TempFileManager, Configuration: BuildTWinWithPortalSvc Win32 ------
------ Rebuild All started: Project: Mont, Configuration: BuildTWinWithPortalSvc Win32 ------
------ Rebuild All started: Project: NOTATION, Configuration: BuildTWinWithPortalSvc Win32 ------
This happens for 100+ projects. Building from IDE or by calling devenv from cmd works fine.