I processed a single roll of 35mm Plus X in D-76 1:1, water stop, and TF-4 fix. Half the roll was exposed at 80 and the other half at 125 because of lighting conditions. The frames exposed at 80 have a distinct brown cast/stain while the frames exposed at 125 are the normal blue-gray appearance and what I normally expect. I have never noticed this before. Thanks! -F.