It does not respond to Win+Left or Win+Right. Not sure what I can do about that but it is difficult to use when it does that. The Scalability UI may popup on the Rift Display. Use ATI or NVidia Control Panel to force 75 FPS on the Rift Monitor.
Since its a modified build to support 0.4.1, its still a little quirky but one benefit is not having to pause the service but anyway let me know if it works for anyone. I've compiled a number of the UE4 Demos for Windows 64-bit using Unreal 4.4 branch and Oculus 0.4.1.