badvogato: I'm innocent, really! I'd never even heard of `preemptive threading' until I did it! I'm not naughty on purpose.
Postscript: badvogato is indubitably a CMoMM.
Postscript #2: looking for an old USENET correspondent (Paul Marks), I found this old post. What a prize turkey Shawn Wilson was! I hope he still has an academic appointment, and his *response* to my post (no kidding) turns up to haunt him... or even better this (cringes with vicarious embarrassment). Top result for `Charles Stewart Shawn Wilson' on google groups, btw =D
Postscript #3 (3rd Feb) tk: Perhaps you are right...