Upon activating the LV mode of the Nikon D90, the indicated Shutter speed will cease to automatically update its value to indicate the changed settings on the camera.
"In LV mode the shutter speed is frozen at the value taken at the moment of activation. It doesn't change where ever you point the camera. However, it does meter correctly, but this new value is not seen after you shoot.
This also applies for the top level LCD and it doesn't work with Camera Control Pro either.
Nikon support has confirmed this bug."
Abstracted from DP Review.