I've had my Toshiba 57H81 for about 5 months now. On top of the set is the JBL S-center, and about 10 inches on either side of the set are the JBL S-38 mains. All of these speakers are magnetically shielded. About 3 feet to the right of the TV is a JBL PB12 subwoofer, which I'm not sure is magnetically shielded or not. The problem is that two nights ago I noticed a very small discolorization on the right side of the screen, a problem I always thought resulted when there is magnetic interference. The spot is very small, only about half the size of a penny, but I'm afraid if I let it go it will grow much bigger over time. On my old 27" direct view I had some speakers that weren't magnetically shieled sitting too close to the tv and it resulted in a permanent color "splotch" about the size of a golf ball. I DO NOT want this happening with my RPTV. I'm a little confused as to why the spot is there, since I thought magnetic intereference wasn't as much of a problem with RPTVs as it was with direct views, and also since I thought setting my subwoofer 3 feet from the tv would be plenty of distance to avoid any potential interference. Could my sub really be interfering with the TV's CRTs, or could the problem lie elsewhere? Any advice would be greatly appreciated, I'm freaking out.