I first tought that my pal's Pio plasma was malfunctioning, but as he had paid $4000 I didn't want to make him disappointed by pointing out the flaws. But when I'm at his place, I can barely watch a movie through without beeing intensely irritated and getting sore eyes. Lucky I couldn't afford a plasma and went for LCD :-)
It's amazing that plasmas are generally meant to have superior picture quality over LCD, when they all have this issue. I'll do my best to inform my peers of the problem, so they know what they are getting into, and check if they are sensitive to flicker, before buying a screen that will make their eyes hurt... Most people can't even see the difference between plasma and LCD picture quality, but if they are sensitive to flicker, they surely notice the yellow flashes!