If I remember correctly, in the previous forum the topic title was bold when it contained unread messages. This way it was very clear and one could immediately see if there were some new posts. Now, the topic titles are always bold. I know the icon in front of the topic turns green if there are unread posts, but this cannot be seen very easily at a first glance (also because the difference between the green and grey is not that large).
I would be in favor of removing the bold font when a topic does not contain unread posts.