I do believe the guy that, at its roots, it's a different issue; the symptoms (misfiring pixels coming out purple) can be similar but it doesn't really look the same. I was over at my friend's the other day (he has a 9UK with clear "snakes") and we watched the Dark City blu-ray, snakes everywhere on green/gray backgrounds and sometimes people's faces, looked exactly like I remember with the old 600U. When I got home, I popped the BD in to re-watch some scenes on my 10UK and it was definitely different. I still got purple pixels and some "smearing" at contour edges but it wasn't quite the same thing.... clearly a problem, but definitely not as severe as on the 9UK/600U (or the photos in this thread).
I do think that specific problem was isolated to those 9G sets. The rare occurrence on a newer set seems of different origin, more like the occasional defective panel, some horrible false contouring artifact gone wrong... unfortunately I got nailed twice
. I've stared at a lot of other Panny plasmas (both in stores and at friends/family's houses... my parents have a PX80U, my brother has a PZ80, my friends have PX77 and 50PX1) and have never seen it elsewhere. Either way, as long as Panny takes care of their customers, which they seem to do, I'm OK with it.