Yes, well, had to do some forum streamlining and converting and that is a side affect of it. Apologies.
At the bottom of the forum on the right is a "Mark all as Read" or something similar. Click on that and they will all show viewed.
The forum hasn't been super active during the summer so it is pretty safe. Check the recent posts at the bottom of the index page for what you may have missed.
Thanks for bearing with me, just doing some summer cleaning/optimizations on the server.