Yeah, I see you guys are constantly updating things.
I guess when I first came in and saw that all icons were red, it threw me off. The only suggestion I still have is the same one I made before. Make the entire row a different color for threads that have new posts. It would help differentiate things more. Not a strong color, just make it a light/soft color, it would help I think.
Also, one other thing I just thought of, you guys should make an option within the thread "listing area" that gives the user the ability to mark all threads as read, other forums have that feature, I'm kinda surprised phpBB doesn't. Or maybe it just hasn't been integrated? That would help some with the above issue.
Good job though on everything else thus far.