I've been trying to use the DK2 since Yesterday, and after some inital issues I managed to get it working, but there are some issues left. The main problem I have is that if I use the DK2 in combination with the camera and the Configuration tool's Demo Scene, the view shakes and it looks like the camera wants to correct movements I make with my head, so that I cannot look around.
If I put my hand on the camera or move away from it, this behaviour is gone, but when I move my head, the surrounding moves more quickly than I would expect (e.g. I only have to turn my head a bit to look around).
I have tried the Oculus with and without external power, but that does not seem to help. I have the same behaviour with Direct mode and with Extended Display mode. I run it on a Windows 7 64-bit laptop with GT 555M mobile GPU (non-optimus).
Anyone else with the same problem or with a solution?