Several times today I've had my replies to open threads refused with a message along the lines of "You do not have permission to....". None of the threads were locked or in the process of being moved. In each case if I typed my reply in again it was eventually accepted. Usually I only had to retry once but just now it took three attempts. Anyone had same issue? Example would be this thread... https://www.physicsforums.com/index.php?threads/856044/ In case it matters I'm using the app on a tablet.