Add me to the list (SN# 73469882). Touchscreen just went non-responsive today (out of the blue). Remote would wake up on a touch but no buttons worked. All hard buttons were fine. Calibration would also work fine (after a firmware flash) - oddly enough.

PeraV's cleaning idea seems to have worked for now. Also gotta give props to bongiornoa, great instructions!

Update!

Now I seem to have a calibration issue. That is the remote seems to be losing it. After a short while (10-15 minutes) the lower left of the screen doesn't register a touch. Recalibrating seems to have corrected this (?!?!) We'll see how long it lasts....