As the above two in the forum control display different sets of results, can someone explain the difference? Thanks.
The "New Posts" list are threads that contain unread posts since your last visit. The red bookmark icon to the left of each thread indicates unread posts, and if you click on the bookmark, you'll be taken to the page of the thread where the new posts begin. The "Recent Posts" list is a comprehensive list of all threads that have been posted to recently, some of which you may have already read. So in the Recent Posts list, some threads may have a bookmark beside them, some may not.