The switchover to Wordpress 1.5.1.2 has been completed. Since, thanks to the Spam Karma 2 plugin, Wordpress is actually quite resistant to comment spam, the automatic moderation is no longer in place – however if it thinks that your comment might be spam then it could ask you to complete a captcha. Although there are accessibility issues with captcha, morally and legally (Disability Discrimination Act 1995) SK2’s version is fine because the worst that could happen is that I have to manually moderate your comment (which is what would happen if there was no captcha at all) – so disabled users are not treated any worse as a result