We started noticing that our LG 55LM7600 will go intermittently blurry in the bottom 1/3 of the screen. It basically snaps out of focus for a few seconds and then back into focus. It's very noticeable on shows with sub titles, or shows where there's a logo along the bottom. It's not so blurry that the text becomes unreadable, but it's blurry enough to be noticeable. Some nights there are no issues at all. Other nights it'll start up and snap in and out of focus every 20-30 seconds.