Usually it is under light braking, although it has happened once under harder braking. Pads and rotors are a year old, and I re-torque my bolts personally with a torque wrench if the wheels ever come off.

98 Silver Frost SVT 97 BMW 540I Sport, six speed "Blue is for sky, black is for soil, and white is for simplicity, purity and hope for the future" "A coveted car should never stunt your life, but should make it more rich and interesting."