Don't know how to count this - as a bug or a feature or just confusion. When looking at the list of forums, there is something that is misleading and I don't recall that the old system worked this way.
Let's say that I look at the individual threads listed under General. I respond to the first, third, and fourth, but the title of the second problem tells me it is something for which I have no expertise. I don't respond to that one. So now when I am looking at the list of threads under "General" I will see that the bolding on the first, third, and fourth items is gone, but the bolding on the second item remains. Still not an issue. That part is expected behavior.
But now when I step one level up the tree (to see all topic headers), what I see is that General is bolded but the title that is bolded is the FIRST title. I sort of recall that on the older s/w, it wouldn't show me the first title in that case, it would show the second title because that is the one that would cause the bolding under General. Maybe my memory of that is wrong, and it isn't a show-stopper by any means. But it caught my attention.