I just wanted to pass along that several times, including just now, I've seen the site lose track of what articles I still have left unread. Today's case is fairly typical: I came to the site this afternoon, saw that there were many forums that had new articles in them. I opened one forum. I started reading some of the new messaged. Something came up and I had to leave for about an hour. When I came back I finished up on the links from the forum. Then I went back to the main Knoppix forum list. But all of the forums now showed that they had no new messages, even though I could clearly see that their most recent message timestamps were more recent that the last time I had read the forum. Note that I never used the "mark all messages as read" feature (which I would hope applies only to the current forum anyway, but was not a factor never the less).

As I have seen similar operation before. maybe this is somehow an intended operation of the site, but I'm hard pressed to understand why it works this way.