I removed the "Newsletter" usergroup, so if you happened to be a member of the "Newsletter" usergroup and not a member of the "Access" usergroup, you will lose posting permissions on these boards.
If this happens to you, simply do the following:
1. Click on "Usergroups" in the very top right hand corner of the forum. (or click here)
2. Select "Access" from the dropdown menu.
3. Click "View Information" on the right.
4. Click "Join Group" at the top.
5. Wait for your request to join the usergroup to be approved.
P.S. I removed the "newsletter" usergroup because the RSS feed made it unnecessary.