Have the same issue, noticed during hockey. Contacted Panasonic, they sent out a tech to take pictures, never heard back. Called weeks later and they closed the issue telling me it was burn in. They told me this after the warranty expired, I explained to them, that I was watching ESPN for approximately an hour before the tech showed, (never previously), and tried to explain that the sportscenter bug wasn't burn in and would fade in a few minutes. He ignored me, took flash pictures of the white screen, (would a slight yellow blob show up with that, who knows?). Panasonic said case closed, yet I still have yellow blobs. Pretty angry.