Well, I'm stumped. And I get the feeling that whatever the solution is, it's going to make me feel very silly. For some reason, I'm finding myself unable to post new threads anywhere on my (newly transferred from vBulletin) forum. And I'm having a heck of a time tracking down whatever could be causing it. My staff members aren't experiencing any problem posting. I've already tried to match my usergroups to theirs to see if that would fix the problem, with no success. When we have identical usergroups, they can post threads but I still can't. That rules out something stupid like not having "Allow new messages to be posted in this forum" ticked (it's ticked everywhere I've tried to post), or something being set to "private node". I've used the permissions analyzer to check my global thread creation permissions, as well as my thread creation permissions in the individual forum nodes, and there's no problems there. I've checked my own individual user permissions, my admin and moderator permissions. Nothing there that looks out of the ordinary. The only difference between myself and one of my admins who can access everything is that I have hard delete powers and they don't. So... what could be causing this? What have I missed?