For some reason, WordPress is selectively holding comments for moderation. I’m not sure why this is happening – it’s been set to automatically accept comments since the beginning. I checked the settings and they’re still correct. I’ll investigate and hopefully get the problem fixed. Until then, if you leave a comment and it doesn’t immediately appear it’s probably because of this bug. I’ll approve the comment as soon as I see it.
Sorry for any confusion or inconvenience.