Qt issues with Dlls in Debug in the pre-compiled version for visual 2005

There is an issue with the Dlls supplied with the commercial version of Qt 4.7.3 pre-compiled for Visual Studio 2005.
In debug mode, we can't load a custom dll linked to QtCore and/or QtGui with the windows functions ::LoadLibrary(..).

There is a Checksum error on the QtCore and QtGui Dll seen in the Dependency Walker executable of Microsoft (Depends.exe).

So we configure the Qt 4.7.3 and rebuild it manually, and everything was OK.

Obviously, we first delete and rebuild our own projects dll first.
It was ok in Release mode, but KO in Debug.

Thanks.