>Now for the >dumb question: I understand the "curve" reference >in Levels and Curves, but what are we referring to when we >state level?
No such thing as a dumb question!
I believe "levels" refers the sliders on the horizontal and vertical axis of the curves chart. There are five of them in Capture NX2. They are little triangles, some black, some white. In the documentation they are called the Black and White Output Sliders and the Black, Mid-point, and White Sliders.