I picked up a Panasonic 65 EZ952b the other day and had intended to avoid checking on slides for banding. However, I noticed a vertical line in some content (it's not noticeable most of the time), so I had to check slides to be sure. The TV was on offer as it was sold ex-display, although I was assured it had just been put on display and was free of any issues/image retention. So I'm not sure whether what I'm seeing is banding (I'm guessing it is) or some form of image retention. What do you guys think? And would you think this acceptable?