There's a typo in the FAQ.
These lines (item #6):
Remember the result.
select acs_permission__grant_perission ( user_id, security_context_root, 'admin' );
Should read as:
Remember the result.
select acs_permission__grant_permission ( security_context_root, user_id, 'admin' );
I tested this on OpenACS 5.1.5.
How do we maintain the FAQ?