Since I bought my Mitsubishi WS-55807 a year and a half ago, I've been trying to get an ISF calibration done. I live in a medium-sized city that doesn't have a large HT market, but was pleased and surprised to find that there was one ISF-certified technician in my area. He came over about one month after I got my set, and after going through the convergence and basic settings, realized that he didn't have the service codes to get into my set. He left after that, promising to get the codes and come back to complete the calibration. One year later, he finally got the codes as well as his ISF recertification. He just came over tonight to give it another shot. He just left the house after 4 1/2 hours of messing with my TV. After setting up the high intensity grayscale to the 6500K NTSC standard, and tweaking the low-intensity settings as well, we watched a couple of DVD's and found the picture to be too red. After trying a couple more settings, we finally realized that the picture in the service menu is different than the picture when not in the menu! This means that any measurements made inside the service menu are meaningless, since when the menu is exited, the red and blue levels change dramatically. I finally just asked him to return to the original settings, since my own Avia-disc calibrations resulted in a better picture So now he has to call his measurement software manufacturer (Sencore) to find out how to compensate for the differences between the normal picture output and the "menu-mode" picture output, which are dramatically different. I'm rather upset with Mitsubishi for creating such a stupid situation with their product. I have to give my technician credit for his persistance, and the fact that he hasn't charged me anything yet as my TV is still not set up to my satisfaction. We'll give it one more try, and if that doesn't work, I'll just stick with the standard user menu settings that I've come up with on my own. Has anyone else had this problem with Mitsubishi RPTVs?