I've have a toshiba tw56x81 for about a year and a half now, maybe slightly longer. I've just noticed that there are discolorations where the 4:3 letterboxing appears. I was watching playoff hockey in full mode and I noticed the discolored columns on the sides. WHAT? How did this happen?!?! I've calibrated the tv with avia and taken special care to make the contrast and brightness as low as possible. (Just to note, the contrast and brightness calibrations are about the most difficult I've done. Every test is different and each one has its problems.) I've set the contrast and brightness so low that players on Directv's hockey broadcasts always appear to almost be shadows. I know the convergence is different for each input format, I think there are different display settings for each format. I watch a varity of formats, 4:3 in 4:3 and stretched to 16:9. Widescreen movies are watched a lot. I'm confused as to how this could happen and if there is anything I can do to correct this problem? I did buy the extended service plan on the TV and maybe it's time to call that in and get this fixed. Is that what I sould do?