I wonder if this problem is also limited to certain unfortunate sets.
I tried shooting a table lamp and a computer screen in a dark room this morning at ISO 800 and ISO 1600 and couldn't see any horizontal bands in the dark areas of the images on the LCD display of the camera at 14x magnification.
I will download them onto the computer and check later on tonight. Maybe also have to 'torture' the images inhumanely to the brink of death just to have them give up the 'ghost' horizontal bands. :dunno: