forum summary will have orange squares if there are one or more unread posts in a forum.
If you double click on the orange squares it will mark all posts as read in that forum and the orange squares go away.
If you open that forum and have two unread posts they will have the blue square image on the left.
If you open one post. That will clear the blue square for that post only.
If you go back to the forum summary the orange squares will be gone for that forum.
But if you open the forum again you will see the blue square still exists for the one other post you did not read .
That is how it works.
That's been the designed behavior within v7 at least.
