Option to mark as read only when an item has been read, but is not in focus.

When I'm going down the list of unread items, if the next refresh occurs, it ends up removing the item that is currently focused, even if I haven't actually finished reading it.

I think it would make the most sense to mark things as read on "exit" instead of on "entrance" to the item. That way, what you have selected doesn't suddenly disappear on the next refresh.