First a disclaimer. This is NOT meant to discourage the investment in an ISF calibration, especially from experts like our own Michael TLV (who did my calibration). If anything, it shows exactly what a display fails to show a person pre-calibration, what a calibration is capable of revealing. Plus I need to share my pain So I had my 42" Toshiba RPTV calibrated the other day, but sadly it revealed I have been the victim of burn in. If anyone can tell me differently I'd appreciate it. If it is truly burn in, I honestly have no idea how it happened. Followed all the rules about brightness and contrast, static images, calibrated with VE, the whole thing. The effect can be seen here. I verified the problem is in the CRTs by opening up the set and looking into the guns. There was that curved line. Now the kicker is I didn't notice this until after the calibration was done, meaning that the shape (if I'm intepreting things correctly) was buried in the lower end of the grayscale. Right now it is only visible at certain screen brightness levels. It is not visible in scenes with high brightness or deep shadow, only when brightness seems slightly below average. From what I've read about burn in, this does not seem to be typical, which puzzles me and makes me question if it is in fact burn in. Anyways, there seems to be nothing to be done, whether or not it is burn in (one just seems to reflect on me as a careful owner). I'm going to see if I can live with it. The calibration looks great - shadow detail can be seen that could not before, everything looks much sharper. However I have considered perhaps rolling back the grayscale to what it was in order to obscure the shape. I have to make a sacrifice of some kind and it comes down to which is the more acceptable one. Any input appreciated.