Here's another one for the weird noises catalogue. Turning my rear wheel yesterday revealed a tick, tick, tick noise followed by a sharp clunk. It does not appear at the same point of rotation. I feel that it is caliper related and if I put my hand on the caliper, when the clunk happens it can be felt through the caliper. The caliper is very loose and can be wiggled from side -to -side on the mountings; are they all like this?