I understand that it is possible to "remove" the problem by remapping the CCD through changing/resetting the camera's date to the 1st day of next month. You can search in CS or on DPReview forum for the technique by searching for threads using "hot pixel".
I just tried the autoremapping through date-change - and wow - it worked exactly as said. Not sure if the dead pixel's gone totally, but it's no longer visible in pictures, and the deadpixel software no longer registers the faulty pixels anymore.
Hopefully the problem doesn't recur again. Thanks all for the advice, and it's saved a trip down to Wisma.