This is my not even two year old (but completely out of warranty, naturally)  QN65LS03AAFXZA.

These screen issues are more apparent when displaying light colors. I've discussed with Samsung, and they connected me with the awful company they use in the northeast for service. They scheduled the service and simply no-showed. No call, no reschedule, nothing. I had some post warranty issues with another tv manufacturer, and they stood by their product and replaced. If I can't find satisfaction through Samsung, this will be my last purchase for sure. This screen issue is unacceptable.