Hear are my gripes on the present forum. The "mark as read" function doesn't seem to work. When I read a message, or use that function, the messages keep showing up even though I am invoking the UNREAD option. Sometimes a whole bunch of messages from a month or six weeks ago suddenly turn up in various forums.
There is no way to lock in the UNREAD option. In some groups I have to click it every day. I would suggest that most folks want the unread option normally. I think it should default to unread, and new folks can invoke the option to view all messages once when they first go to a new forum.
In forums that have a lot of traffic the "mark as read" function should be close to the top. Once shouldn't have to scroll down past a lot of empty screen to get to it.