Not a biggy, just thought I would let you know.
Sometimes I have to log off before I'm done reading new posts due to work issues. I use the "Show unread posts since last visit" at the top right of the screen. When I go to log off I have logged of from that screen, and also tried hitting Home then logout. In both instances, when I re-login and go to my unread posts they are all gone like I've already read them. New ones will be there but not the list that was there prior to logging off.
Hope that makes sense. Again, no biggy, just thought I would pass it in.