What operating system and what brouser and what anti virus software you guys running ? More more info you provide about your system the better the chance of a fix or solution.
None of those things have changed since I posted in that forum Monday. If you notice, there aren't any new posts at all since Tuesday. The "prefix" thing is supposed to have a dropdown inside the thread title box that allows one to be chosen. There isn't a dropdown. I'm guessing they added some prefix that is only visible to admin/moderators and required it to be used to create a post.
