I spent the last hour on the phone with technical support for my ST50 after the Panasonic in store rep told me that 2000hrs of break-in were necessary for break-in/prep of display. I explained to the person on the phone the situation that closing in on the 200+ hour mark on my ST50 that the image retention has been getting worse and happening faster. When turning on the display the Smart viera logo pops up during boot and I can see during normal viewing and can take normal content use or slide upwards of an hour to go away. I had no input selected while going to the media player to pull up a slide, so they could test the IR I was speaking about. You could see the "No input" banner, the menu wheel logo in the lower left hand corner and the photo/movie/music icons and text at the bottom during a slide. She asked me to tell her what I saw at the top of the screen I told her nothing and she then accused me of lying because if I was experiencing IR there would have been a Media Player logo in the upper left hand corner as well. I switched back to the menu and it was there in "black" I had explained it was primarily white and red that would suffer from IR and she proceeded to tell me that IR does not discriminate and that if my set was suffering from IR it would be any logo/menu icon left on the screen for 5 or more minutes. I have been a supporter of Panasonic as far back as the 3DO, my first widescreen was a 34" HD CRT and the ST50 was going to be a great addition, but after being called a liar I am returning the display. I will consider returning in 2013, but for now I am stepping away from Panasonic. I have no reason to lie I simply wanted to if were doing everything I could to prevent it from happening and all get is someone telling I am a liar.