>Now the only thing I notice, is that the little CF light comes >off and on. Even when I TURN THE CAMERA OFF, the little green >light sporadically comes on for a half second, then goes off.
Just to clarify. When the camera is OFF, the green light sporadically comes on for half a second and goes off and this repeats all the while the camera is off. As opposed to the light coming on and off only during the process of turning the camera off.
Perhaps try removing the lens and see if the behavior changes. I know attaching and removing a lens will trigger the light so it might be worth a shot. It seems like the camera has some unfinished business that it is trying to complete. You might also consider performing a reset.