Wrong & inexistent tutorials
1)As the title said, on this address "http://doc.pfsense.org/index.php/Captive_Portal_Setup" when you click on the "Simple Captive Portal Tutorial" link, you get redirected on a commercial advertisement (Hewlet Packard) and there is nothing on that page to go instead on the requested tutorial, you can refresh or wait hours, just doesn't go to the tutorial.
2)On the "http://doc.pfsense.org/index.php/Captive_Portal_Setup", if you choose the "http://www.pfsense.org/mirror.php?section=tutorials/cp_usermanager/cp_usermanager.htm" it will load this tutorial: "http://pfsense.phoenixkv.net//tutorials/cp_usermanager/cp_usermanager.htm" which said after you have entered username and password you will have access to the web, while in reality you will just be transferred to a grey PfSense's page which states "No page assigned to this user! Click here to logout."
How do you allow an authenticated user to browse the internet?
Ok I have corrected the first entry. And pointed to the tutorial from the tutorials section, that other link must of expired, ie no longer existed.
the other item doesn't make any sense - someone else must of edited the docs section already for what you were talking about.