I recently started to have a problem where I cannot post any messages in my AF. I click submit and the AJAX busy comes one for a few seconds and goes away but I am left in the editor and the message never gets posted.

Any ideas?

Do you have moderation enabled without any response templates selected?

This could be a couple things. Make sure there aren't any other modules on the page that might be causing form validation fail. Also check your event log immediately after this happens for any errors. If nothing is in the event log then something else beyond our control is interfering.