I have Raybestos "quiet stop" pads on it. Not so quiet, eh? lol. They're not ceramic but, rather, "organic?" The rotors I'm not sure what they are, but they seem to be in excellent condition. No signs of warpage by looking at it or feel. (no vibration at all when stopping.) I don't know enough about how breaks work to have any real idea of what would cause the squeal. It soudns a lot like the 'worn break pad' warning that you get when your pads are shot, but the pads are new.
(replaced them myself)
SOme more info: They only squeal when going forward. If you slam on the brakes the squealing goes away for a while, but comes back very quicly. The squealing only happens during light/moderate breaking (IE. normal braking levels.) They are totally quiet if you are doing hard braking (sound like normal brakes).
If you stop using only the rear brakes (by using the emergency brake) they do not squeal, so it'* definately the front brakes (the only ones I've replaced.)