Just exchanged for my third and final 50pe700u. The first had stuck/bad pixels 6 to be exact, the second had two, and (drum roll) the third has 3. They are really visible on a blue or white screen.
I have also noticed a big difference, which I didn't realize until last night, in the number OTA channels I receive between each set. All of which leads me to believe they may have some QC issues with this model.
I finally contacted Panasonic and I'm going have a tech come out since they said this was not normal. I'm giving them a shot to see what they say since I still have approx 45 days to return it and say goodbye to Panasonic which would be difficult and I absolutely love the tv otherwise and not sure what else I'd buy. I did tons of research and and everything pointed me here. I didn' even think it was possible to have bad/stuck pixels on plasma.
I also must say I am impressed but Costco. I actually joined to buy/order this tv on sale and they have been terrific, Will defiantley buy again form them. If they will sell to me
Just in case in anybody is interested the first tv came from California with a build date of Nov., the second I got here in Orlando with a build date in Oct. and the third I got last night here in Orlando with build date in Dec.
Its been about 15 years since had stats in college but I believe that is pretty good sampling and what tells me what I could expect if was actually motivated to exchange it again. If I could find it, I think Costco is almost out of these.