Aha! That must be it. The Captcha Plug-in is in stalled, and I have been using it in my links submission form, but not in the signup form. I'll add the code there and see if it corrects it... The timing is consistent with when I upgraded and added plugins.

Nice catch, Andy, I would never have thought of it... Thanks very much
http://www.turkeycentral.com/ Turkey's English-friendly Internet Directory