I guess I answered a question that wasn't specifically asked. However Hammerhead asked if there were any special considerations for bleeding ABS equipped systems. Since bleeding the brakes follows replacing pads a lot of the time I thought it would be relevant.
Anytime the piston/pistons are pushed back into the caliper (as when making room for putting on new pads) one runs the risk of forcing contaminated fluid back through the ABS controller and master cylinder. My Bentley manuals all suggest this is a bad idea, especially for the ABS controller.