Both photos taken at my table at California Pizza Kitchen tonight, with only change (other than my elbows on table, lop-sided leveling job) being forced ISO at 1600 (top photo) after the camera chose ISO 800 (bottom photo). The level of noise on the 1600 is disturbing. Both are 10 megapixels. It was slightly dark in the restaurant. I took several pics at each setting to assure no movement artifact, these were the best.
I notice my camera seems to prefer ISO 800. Light settings, no matter, it defaults to ISO 800, it appears. Hmmm.