Sheryl, that should be visible to everyone, not just admins. Maybe we're not thinking the same things. The images below show the index with the bright yellowish "P" which means new messages are present in that thread.
The second one shows the second index after you open the thread and there is a green "New" next to every message that you have not read.
The third image shows a little green smiley face on the far left. That indicates that you have replied to the post.
Hope this helps!
