Bax
Sounds familiar. After the Castle Combe trackday my 987 with PASM developed a knocking from the off-side rear - just in right hand bends, or rather as the suspension unloads after a sharp right hander like a roundabout. Initially thought it was something rolling across the boot as it was at shoulder height - but it came from the wrong side, and anyway the boot is the other side of the engine so unlikely to hear anything from there.
Went back to OPC for checkup (quite a trek for me) and despite explanations of the problem to both the service manager and the technician, including precisely where it was coming from, when it happened and the sound of the noise, they diagnosed..... A half-full plastic coke bottle under the driver's seat. I tried patiently overt the phone to explain that if that was the cause why does it occur only when the car unloads after sharp right handers, why did it come from much higher up and behind me, why did it sound much more metallic than a plastic coke bottle ever could and why am I fool enough to not find this myself. Sure enough, the first right hander after I pulled out of the OPC on the way home "clunk". Short on time I couldn't go back. Arghhhh. Why don't people listen? Can you keep me posted on your experience of the problem?
Cheers
Marcus