Oh, OK - I assumed it was a database error, but it's not. I'm not sure what causes that error. (hopefully someone else has an idea).
Edit: OK, I think it might be the "Who Read a Thread" feature, which is turned on under "Thread Display Options" in the admincp settings. But I don't understand why it wouldn't work. Did this just start happening, or did you make any changes to your site recently?
|