Comments weren’t working for a few hours this afternoon. Problem turned out to be that the Bad Behaviour WordPress plugin was blocking all IP addresses for some unknown reason. Plugin now deactivated until I can be arsed working out how to fix it and comments are working again.

UPDATE: Turns out there was an urgent update to Bad Behaviour released today in response to this very issue. “A third party blacklist which Bad Behavior queries recently began sending false positives for any IP address queried, causing everyone using Bad Behavior to be blocked.”

If you’re running Bad Behaviour on your WordPress installation (and you should be) upgrade to 2.0.11 straight away.