I just found out that that my touch screen is no longer pressure sensitive. Didn't realize this until I fired up the "Colors" homebrew water painting app. I have confirmed this to be the case, since I took my copy of colors and tried it on another DS and it worked just fine (no calibration). Is there anything I can do to fix this or is warranty/Nintendo repair center my only choice (do they send out refurbs for replacements?) Note: Games still work fine, so it may not be worth dealing with.