I had a similar problem with my previous S15. Turned out to be metal dust on the sensors. They attract that stuff as the sensors are magnetic. removed them from the calipers and gave them a good clean and the problem dissapeared.Will do!
A friend suggested taking the battery off for a while to reset, did this and the light went out, but now it comes on from time to time and I've notice some movement in the brake pedal at slow braking speeds....
ha ha thats the puppyNo, the handbrake light comes on when the brake fluid is low.