Operating system and graphics card
Windows 8.1 - NVidia GeForce GTX 980
Broken: Blender 2.79
Short description of error
The Normal pass of the Cycles rendering does not take the normal map information, only the normal from the geometry.
However in the combined render the normal map in correctly taken in account.
Exact steps for others to reproduce the error
Unzip and open the attached Blender project.
Press Render, and see the resulting Normal Map which will be saved in the project folder, which does not include the normal map from the plane material.