[Dave Moll]

I assume you just get one or two thread listed in this way, in which it's probably that they have been posted while the forum thinks you are still connected. As far as I'm aware, the forum depends upon a period of inactivity to deem that you're no longer connected, not having any "knowledge" of whether you're still displaying its pages without clicking anything.

I use the forum in exactly the same way, though not necessarily closing down after the main menu is displayed, and occasionally get the same thing as you describe - which puzzled me at first.