When I set the exclude rel nofollow domains in the settings that works great for links in the body of a topic.
However, if I paste a link into the title and it adds the link under the title that link still has the nofollow tag.
example: Lefaucheux Model 1859 Carbine - Firearms | Armes à feu - Lefaucheux Pinfire Forum
in this case aaronnewcomer.com is excluded from nofollow in the settings and does not have it in the onebox, but does have it up by the title.