I am performing the following steps in Visual Studio 2010, SP1:

* Create a new, empty Win32 project.
* (now the property manager shows `Microsoft.Cpp.Win32.user` added
* Click Win32 in the tool bar and choose "Configuration manager"
* Active solution platform ->
* Type: x64, copy settings from Win32 and "Create new project platforms" is checked
* Now "Release | x64" appears in the property manager, but `Microsoft.Cpp.x64.user` is NOT added.

I am positive the default property sheet `Microsoft.Cpp.x64.user` was always added to x64 configurations before. What has happened?