I've got the Hitachi 43UWX10b with a Panny RP-56 progressive scan. I've calibrated with Avia and everything looks great... except every once in a while, certain shades of color do this wierd thing. I'm not sure how to describe it. If there's a brown wall in the background, you can see kind of a pulsing line pattern moving from top to bottom, almost like a shaded sine wave. I'm using Monster component cables that I already had when the TV was delivered, and I was wondering if perhaps the quality of those could cause this sort of problem. It only does this for brownish colors, which is odd. I guess it's possible that it could be some wierd fluke of the Hitachi's conversion from 480i/p to 540p/1080i, because the problem occurs in all modes... but is there anything else that could cause this? Should I get some higher quality cables?