I bought a 50PZ800U in January. First off, I love the picture. It is amazing. I just got a PS3 and Blue Rays are great. However, after only about 3 months, a vertical line was present on the screen. It was VERY noticeable on a white background. Let me say that I rarely watch 4:3 content. Panasonic sent techs and they replaced a number of parts, but did not solve the problem. When I contacted them later, they said it was my Bell tv. Apparently there is an issue with 4:3 programming from Bell. They said it was burn in and not covered by warranty. However, I told them the tv was only 3 months old and I do not watch much 4:3. The line has slowly been fading away as I watch more HD tv, something they said would happen.
The point is that I bought a $3000 tv that had burn in after only 3 months. I thought burn almost elminated with the newer tv's. I did a lot of research before I bought this tv. I love the picture, but I am afraid anytime I watch anything that has boxes on the sides or top and bottom. Anyone else have a similar issue?