On Tue, 2004-06-22 at 18:56, Casey Crookston hijacked a thread. Casey (and others): Just a quick heads-up. If you want to start a new thread, *please* start a new message in your e-mail client, rather than replying to an existing thread and changing the subject. A good number e-mail clients don't thread by subject, but by the hidden "in-reply-to" message header, which gives the message id (again, hidden) of the message being replied to. Thanks in anticipation for your co-operation, Tim -- Tim Beadle <tim.beadle at iop.org> Institute of Physics Registered charity No. 293851 76 Portland Place, London, W1B 1NT, England IOP Publishing Limited Registered in England under Registration No 467514. Registered Office: Dirac House, Temple Back, Bristol BS1 6BE England This e-mail message has been checked for the presence of computer viruses.