Win7 64 - Radeon HD 6900
Broken: Blender 2.72 test build
Short description of error
When working with multiple Windows, Mouse-Click and Mouse-Wheel work now excellent. (Thank You, btw.)
But the Keystrokes doesn't.
Exact steps for others to reproduce the error
Open a second Blender Window with duplicate Area. Try both Windows with Mouse over it, and check the Keys. Text Editor don't work, 3D View G,R,P, ... Keys don't work, and so on. Until you click on it to get the Window Focus manually.