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.
Translations:Creating an Automated Installation with pc/9.2/47/en
# Line to be passed to the "ifconfig" command to bring up an interface nic_config: em1 172.16.80.250 255.255.240.0