[Edit: fixed, I needed to confirm my email address again]

Wait, where did that come from? Hmmm, I think I've spotted a bug in LJ's policy of not letting you edit posts that have been replied to: if you edit while I'm writing the reply, I still end up replying to something other than what I meant to :-)

Hmm. So now you made a change and I made a change, and I'm not sure which one caused the problem to go away. Can I ask you to try again now, please? I've reset my comment setting to "registered accounts only", and I'd like to know if that includes OpenID. (I hope it does.)

I'm pretty sure it does. I should have reported the whole error message, not just a snippet: it said commenting was limited, but it also told me I needed to be logged in, and to have set and confirmed my email address. I ignored that bit at first in confusion because I thought I had done so already.