Brake experts question

[PostmanPete]

HAve a new set of wave brakes and now I an getting a slight shudder under braking and a noise that I can only describe as sounding like a semi pulling up (that screeching brake sound big trucks make when pulling up), is it possible that the rotors are actually slightly warped - does anything else cause this to happen? Replaced the pads as a matter of course but no diff - have done about 400km so far and dont seem to be settling down

Same happened to me on my R1, rotors slightly warped almost immediately they were fitted, (along with new pads). Took them back, machined flat under warranty of course, problem solved.