I've just bought my first plasma, a 504. It seems pretty good, but there's one problem. There is a fair bit of noise visible, and it's being introduced by the display itself. The noise is visible from 2-3 feet in a soft-focused image and the grey side masks and on-screen menus. On sharper images and those with fine lines (like a PC desktop) this noise causes a shimmering which is visible around 3-4 metres away. This is present no matter which input our source is used (I have tried tuner, dvd, and PC so far.) The same noise is present in the Pioneer's internal freeze frame image and the grey side masks, so it can't be from my sources or poor cables. (The noise is moving in the freeze frame.) I have switched off everything in the house apart from the plasma and I can still see this noise. I have the supplied ferrite fitted to the power cord. The noise seems to be uniform white noise, no particular pattern. It's visible all the time in every image. Can anybody tell me if this is normal for a plasma? Is it normal for the 504? How bothered about it should I be (given that most of the time you can't really see it, unless you display an image with lots of straight lines?) TIA.