Hi. I have same problem with my Samsung UN46ES6150. I have a theory as to how it might have been caused. The backlight bleeding might be caused by what I did when hanging the TV on the wall. Prior to putting it up, I laid it on my bed, face down, which may have caused some pressure on the screen. When I first hung it up, there was clouding. I had to take it down and rehang it because it was not up securely. I put it down, face down on the bed again. When I rehung it, the backlight bleeding was still there, but there was more of it. I think any pressure on the glass screen, or possibly on the frame on the sides of the TV, through the side LEDs off on a slight angle, causing them to create the clouding effect.
Another theory, which I might try, is if there is a way to suction the screen a bit away from the TV, it might reduce the clouding. I read also you could loosen the tightness from the back, but need a professional. I am not advocating anything here. Just offering my thoughts. I bought my TV from what I now know is an unauthorized dealer, so I am not under warranty, although the store said I was. Luckily the price was low enough as to not upset me too much. However, Samsung should recall these TVs and fix them. I have decided I will not buy another Samsung TV because of this. My 5 year old Sony XBR 2 TV is more satisfying than this Samsung. Screen is crystal clear. It has a contrast ratio of 10,000 to one and the Samsung is 5,000,000 to one. I still like my Sony better. Samsung needs to wake up and perhaps Google the comments out there. Many complaints about the backlight bleeding. GLTA