Does anyone ever see the glide slope following the standard -700'/min until about 500' AGL, then seem to become steeper?  It seems a couple of airports that I have landed at, using a manual approach but in the slot on the way down, seem to have this happen.  I dont know if the Auto Land is just reacting to this sudden change in glide slope and therefore not giving the AP a chance to do a nice flare and roll out.  Just a thought.