captainkanji said:
I use the RAW picture format. I use the preview image on the screen to check exposure, but that's about it.
No, you don't. There's no 'RAW format' - a RAW 'image' can't be viewed. What you're looking at on the camera's LCD is a JPG image, converted in-camera with whatever settings you have (picture style, ALO, high ISO NR, etc.). Those settings don't affect the RAW data directly (with the exception of long exposure NR and sort of but not really HTP), but they do affect the JPG preview image stored inside every RAW file, and the histogram is based on that JPG. So, to the extent that you make exposure decisions based on that review image or histogram, your selected picture style, etc., can affect your RAW images.