Under attack

This site is under a sustained trackback ping attack from an online gambling spammer. I shall have to invest some time in finding out how to prevent this in future (my sql skills being up to the task of removing such pings from the backend database).

Trackbacks disabled for now.

I've cleaned up the mess and enabled trackbacks again. I've also applied a small tweak that has a slight chance of encouraging the spammers to move on, but it is by no means certain.