In my continuing adventure with my old Kiev 88, I decided to replace my backs with new ones. The backs are cheap, and cost almost the same as replacement seals, so why not? So I have received my slick new NT 6x6 120 backs (two of them), and tried them on my old Kiev 88 body. And of course, ran into a problem. I properly loaded the film, and mounted the back on the camera. Both indicator windows are white. I take a shot. The body indicator window turns red as it should, but the back's window stays white. Because of this, when I cock the shutter, the back doesn't advance the film. If I then make a second exposure (with my hand over the lens to avoid a multiple exposure), the back's window turns red and I can advance the film. The back does have a multiple exposure setting, but I do not have it set in that mode. If I do put the back in that mode, of course the film doesn't advance, as I would expect. The behavior is fairly consistent (but not perfectly so), and is the same with both backs. I must make at least one (sometimes two) additional shutter releases for the back to indicate that the frame has been exposed. I have observed the rare case where the back did indicate an exposure occurred on the first release of the shutter. I have also observed that if I tilt the camera so that the windows are angled skyward it seems to more readily show the red window on firing the shutter. But I haven't determined that this is consistent (or even if I am just imagining that tilting helps). Is this a problem with the old body? The information with the NT backs seem to indicate they will work with the Kiev 88 and Kiev 88CM bodies. I have the former.