That's weird. I went into the forum admin settings and merely viewed and saved the Boards. It must have reset something that was screwing up your permissions.... I don't know why it worked, but happy that maybe it was what fixed it.
Did you get this one?! Please click the button on the end of the reply line and toggle it to Receive Emails and Alerts. There are probably more things to change and check that you email address is current. I received a notification Receive Email Notifications and Alerts. I think something changed for everyone.