"You did not specify a username for your post."

[Daidalos]

I'm getting a weird error:

The following errors occurred when this message was submitted:

1. You did not specify a username for your post.

For some reason, I am able to browse my forum, send PMs, and log in to the Admin CP, but I can't post anything. What's the problem and how do I fix this?

[Reeve of Shinra]

Running mods? Have you disabled mods in the config.php file to see if that is the culpirate?