If you are using LR3 (not sure about older versions) have you checked your Profile, under the Camera Calibration menu in the Develop Module ? Try changing it to the other options available to see if this gives you something similar to what you see on the screen on the back of your camera.
|Owens Valley Milky Way by ed rader|
from Sign, sign, everywhere a sign..
|Break by Hank3152|
from Motion blur
|Camp by T bird|
from A Big Year - birds
|The Maasai Shepherd by cgravel|
from - African Man - (Portrait in Black and White + A Border)