As Rick said, we have changed the default so that if you 1) start a new thread or 2) reply to an existing thread, you will be subscribed to it by default so that you will be notified when someone else replies. This is how some of the other forums I belong to work. We are trying this to see if it will help spur activity on the forum. Sometimes a person will post a question either in a new topic or in a reply and then never come back to see that they have replies. If you want to unsubscribe to an individual thread, simply click on "Thread Tools" at the top of the thread and select Unsubscribe. (Or you can "subscribe" to a Thread if your not already subscribed and you want to get notifications of new replies).