OMG i got the exact same problem.
Just happened out of know where an hour ago
Was at friends house from morning, drove the car around to go get lunch etc (No problems at all).. So when the time came to come home, turned it on and noticed the light was on.. strange!! so kept driving.. still on!! Turned the car off at the lights, turned it back on and still on.
Drove home, car felt normal. Brakes work as per usual.. Hard-braking the car pulls up nicely.. NO dramas!!
The brake fluid resivor is full.
Thats all i have checked so far.
Got told by a friend that the fuse could be gone. So will check that tomorrow.
Nickandsarah - check your fuse (located under the steering wheel - green one.. so i was told)