I can confirm that this problem still seems to exist, and that it definitely seems to be related to DirectX 11.
In a variety of games, turning DirectX11 off (either in-game or using ini files in some games that don't present you with the choice) fixes the issue. But this is obviously not ideal.
I have a laptop with a native resolution of 1920x1080, but tend to run games at 1280x720 because it provides much better performance on my HD 4400 graphics chip. This bug and the memory leak issue on Windows 8.1 are extremely annoying.