I'm very interested in this answer. When I sent my D2H back for the metering fix, they 'cleaned and calibrated' it. When I got it back, it had what looks like a tree in the viewfinder. It moves around in the viewfinder as I move the camera.
Hasn't caused any other problems, but it is very irritating.... :?
Flew, is it in sharp focus or blurry ? If it is sharp, it probably means it is resting on the focusing glass, else it could be on your mirror.
I had my D70 changed in its first 30 days for an eyelash caught on the inner surface of the focusing glass. That's it : changed. I would certainly not hesitate to ask for a good clean again. There were no specks on the 5K you paid.
It isn't on anything. It just floats around in the viewfinder. It is sort of 'in focus' I guess, but is always visible when I look into the viewfinder. Sometimes it is off to the side, and sometimes it is right on top of one of the focus sensor indicators.:?