Hi, James. I just realized that it was caused by my "IntenseDebate" comment plugin. I deactivated that and re-activated my "Disqus" comment plugin and everything is working fine.
Yes, I have Akismet, and I LOVE it, but apparently it was my commenting plugin. I've seen IntenseDebate on many other sites, but apparently I can't get it to work on mine.
P.S. On a slightly different topic: Are you aware of any known issues with some widgets for WordPress 3.0.1 showing on Vista but not Windows 7? Just curious because my e-referrer widget nor my Feejit widget won't show on Windows 7 (my home PC), but I can view them both on Vista at work.
Just thought I'd ask since I have a "tech wizard" to talk to. ;-)