Hey, not sure, but definitely seems like a bug..
When i make a new topic as a new user, iam so far not allowed to post links to sites, but after i create a topic/post, i go to post options-edit and in edit i post the link, and it works, no error no restriction.
My profile shouldnt be able to do this, right ? :
Although its not hyperlink, its still a link. Unless that doesnt count then..