I have the new Panny 50" 60U and want to send a word of caution to everyone using a 360. I've got about 100 hours on the set, and have been using the 360 since about the 25 hour mark.
With all the settings turned down considerably +5 picture and +5 brightness - I began by been playing Perfect Dark for a few hours here and there. No image retention, so I assumed things would be just fine.
Well, I started playing Kameo and one night after playing for about 2 hours or so (I've limited all sessions to 2 hours max) I turned off the game to watch Lost. While inbetween signals it looked as though the score counter and the trigger buttons on each side were definitely retained in the sets image.
I turned off all signals to the TV but left the TV on and sure enough the life bar, score, trigger buttons, everything that was a static image throughout gameplay was very evident on the display. When I sent a signal back to the TV you could not see any change in the TV image from normal viewing distance, but up close you could definitely see the image retention - not dramatic, but there.
I watched TV for abour 2 hours thinking it might clean up the retention. I then turned off all signals again but left the TV on - much to my chagrin the IR was still visable. Lighter - but there nonetheless.
I checked it again in the morning, and it seemed to be gone. That night I turned down the settings to 0 on everything, played for about 20 minutes as a test, but the IR was back and stayed there all night again as described above. This time it was not gone in the morning either. I had my wife watch as much TV as she could that day, and the IR was gone by the time I got home. However, the psychological damage has been done and I am far from confident that this will not lead to permanent damage if I continue to use the 360 on it.
I am seriously bummed because the image on the Panny with the 360 is absolutely the most beautiful I have ever seen - my buddy has the SXRD and it looks good, but there is something about the Plamsa - just awesome.
I am not trying to be an alarmist here, as many have indicated that they have had no issues, but I thought it important to let people know what I've experienced.
There is no way I am going to scar this puppy - I'm having nightmares about watching a sweet Sci-Fi DVD only to see the high score from freakin Kameo etched into the backdrop of an epic space battle.
For now I've decided to "settle" on moving the 360 to my old Hitachi 51F510 - it's still high def, and still looks good, but nothing like the Panny.
Anyone else out there had this problem???