I tried to understand what "Updated Topics" (next to "Unread Posts") is doing but I didn't get the logic. It either shows the exact same topics or nothing at all. Can someone explain what it is?
It's probably showing threads in which you did post before and an answer was given subsequently.
ah, the link says ".../forum/unreadreplies/" - that makes sense then.
(does the text "updated topics" make sense?)