Yesterday jordi told me that he had updated his pyblosxom installation (he is using a source installation, while I use the .deb package that was already at version 1.2) and that he had installed the nospam plug-in to avoid SPAM.
I disabled my comments a long time ago because of the blog SPAM, but after looking at the solution, I've installed the plugin and re-enabled the comments, I feel they are better than private e-mails when people wants to talk about blog entries.