All of a sudden, the Color Readout (or whatever you call the numbers under the Histogram) refuses to go down to zero, even when pixels are definitely black, as verified with a screen Color Picker.
The readout for any NEF file bottoms out at 9,9,9, as does any JPEG PhotoLab generates from any NEF file. A TIFF file generated from a NEF file bottoms out at 3,3,3. The black on a JPEG test chart registers as 2,2,2.
Did I hit some sort of global adjustment somewhere?
Using PhotoLab V2.3.0.