Wow, comment spam bots hit the comments hard the past few months. Katie noticed some a couple of days ago on newer posts, they'd been hitting the archives for months. One post had aver 1200 comments. I know I'm not that popular.
So for the time being, we've got one of them 'enter the letters you see' thingies. Don't like it - blame the spammers.
All in all removed 3,294 spam comments. If I got one of your's harry, I'm deeply sorry.