Well, ever since that Memory Allocators post, where I mentioned that Defensio was currently batting 1000, it seems to have started making mistakes. (I guess I should have knocked on wood...)
Firstly, it missed one spam message, which isn't all that bad, given that it successfully detected the over 200 spam messages before it.
However, it erroneously detected this comment as spam. In fact, it's so sure that the comment is spam that it has labeled it as 99% spamminess, and will refuse to mark it as a false positive, even after I told the plugin that the comment was legit. Oh well. Nothing's perfect, and it's a good thing that I still screen all spam comments before purging them...
... I wonder what part of the comment is setting Defensio off?
I'm guessing the "Thanks for this, very handy." part and the several links following it, but that is still dumb =/