As some may know from threads I've commented on, I bought a panasonic plasma but I had to return it as I could see large areas of colour (particularly white) "shimmer". Could someone please explain simply to me what exactly it was that I was seeing? was it 50hz flicker or is it something different? I know that the pioneer doesn't have this shimmer but is that because it has a 100hz picture or is it something else? I appreciate that not everyone sees this shimmer and I'm not trying to start another pio vs panny thread, it's just that I didn't notice the shimmer until the plasma was on the wall and am looking for another. Are most plasmas 50hz straight out the box? Thanks for any input.