This is a very minor issue, but I thought I should mention it. It's a little bit too hard to see that a thread is locked. So maybe we can make it a easier. Maybe a big padlock in the title row and/or down where the reply box would have been. Or a small padlock where each reply button would have been. Here's an example of a locked thread: https://www.physicsforums.com/threads/when-does-1-1-2-become-false.772421/#post-4861545 At this exact moment, there's a link to this thread on the front page, because Mark44 made the last post 22 minutes ago. If you click that link, you're taken to Mark's post, and you will definitely miss the small text at the top and bottom of the page. The text "you have insufficient privileges to reply here" isn't exactly self-explanatory.