Editing posts

Just reporting an issue with the forum, its a new problem that has only surfaced since the move to the new server. I don't know if this is just local to my computer, but I'm often having a problem when going in to edit a post I have previously made. The three buttons at the bottom (Edit, Go Advanced, Cancel) just seem to lock, I can press them any number of times and they do nothing. I have to navigate away from the page and back again, and the edit always works second time.