Hi there, me and my staff came across this problem yesterday morning when one of my moderators went to reply to a thread and was unable to, I didn't have the problem myself and neither did another moderator I have and I had checked all the settings and couldn't see why it was preventing them from posting. I have come online this morning and gone to reply in the same post and I am having the same problem my moderator was yesterday, you can type out your message and then hit post reply but it will just load the page for a second, not submit the post and then give you the option to post reply again. Me and one other moderator are having this problem and another one isn't that I know of, our only solution around it was to create a new thread with our reply and then merge with the thread we couldn't reply in. Any help is greatly appreciated. Thanks.