Just a few thoughts:
Don’t know if these colors are finalised, or just a test of some sort, but about the alternating Orange and Grey: When seeing orange and gray, the first impression is that orange is “New messages!” and grey is “No new messages…”. This is what we had in the old forum, so the impression remained. Maybe alternating orange and grey isn’t the best idea…
Maybe we could keep orange as a signal “New stuff here”? This would include the “Unread” and “New” signs next to the titles.
Do you think it would look better if " unread…" and “new…” were aligned in columns?
Other than that, I am running out of things to critique about the new forum.
You guys are doing great work.