Sorry for the confusion, folks. What had been going on was that the MySQL server was poorly configured (my fault) and kept crashing out, and I kept ignoring the problem.
Today I spent half a day reinstalling Debian and the Web sites, largely from scratch, and working to get things right this time without screwing around with anything experimental. So it should be more stable. But if anyone's still having problems with avatars, please let me know.
Yes, I've been a slacker on the forums. I've been a slacker on a lot of things lately. This past week it's severely damaged a lot of things in my life. I'm working to fix it now, one thing at a time.
If you're having forum issues, or any other concerns, please PM me. It'll get a response. Thanks in advance.