Sorry for the inconvenience. Known Navigation header breakage, its being "rebuilt."
There may be other unforeseen breakage primarily in the handbook portion of the wiki.
The Table Of Contents section of each "PC-BSD® Users Handbook" page may be the best workaround.
The auto-login section should be edited to address situations where PEFS home directory encryption is enabled on a user account.
The "Auto login user" drop-down box does not list PEFS encrypted user accounts when the "Enable auto login" box is checked.