When new pads/rotors are not bedded/heat cycled, you run the risk of uneven pad materal transfer onto the rotor while stationary after a hard stop (avoiding 45+ MPH roads with stoplights is a must, unless you drive it under 40 and assume every light will turn red as you approach).

Most pulsing issues post brake job are caused by this. The solution is getting the rotor surfaces re-scuffed and following a proper bed procedure.

__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!