It just came to my attention that the "reCAPTCHA" system I was using to block spam registrations to this forum has stopped working. Or rather, it was working too well, in that it was rejecting every attempt to solve the CAPTCHA, even obviously correct ones. I Google'd around a bit to find a solution and came up empty handed. I don't have time to pursue this problem further right now so I've disabled the registration CAPTCHA.
Hopefully we won't get flooded with a bunch of spam now.