It's nice to see some updates on forums. I have little suggestion. The image that is shown on threads with unread posts should have a bit bigger contrast compared to the threads with no unread posts.
When I tried to log in, I got a message "your password could not be converted from the previous version of phpbb" or similar, and a note to request a new pw. I did, waited 24h, but got no email.
I would strongly suggest moving the user information from a post back over to the left. This is standard UI design from a usability perspective. It feels completely unnatural to look to the right to find who posted what.