Seems that there’s someone out there spamming the comments on Movable Type blogs. Fortunately, there’s someone else out there who’s written a plug in to help block that sort of behavior. You can find out more about it or download it from the author at www.jayallen.org.
I need to either upgrade Perl on the server or find a freestanding installer for the Storable.pm module before it’ll work here, so I’ll still be spending some time smacking these guys down manually…