Read and green "NEW"s

That's what caught me out too. I believe they go away by themselves after a certain time. Next time you log on dpreview and go to a certain forum, only posts that have new posts since your last visit should be labeled "new".

This works, it's how the old forum worked. It shows you which threads have new posts since your last visit. It's just that for your first visit today will have everything labeled "new" (which happened to me, as well, and is super annoying), but it'll go away and from then on it's ok and actually useful.