Thank you Randy for your informative explanation. I did not mention, however, that the TC-42UT50 I bought from Amazon on September 9 2012 had a manufactured date sticker of August 2012. If the sticker was accurate then Panasonic continued to make the model well after it was "discontinued" in March. Something seems wrong with this picture, and not just pixils.
1/1/13 at 8:28am