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.
PC-BSD Live Mode
Which would you like?
- Release (10.1)
- PC-BSD® Live Mode
(Sorry, this does not exist for 10.1.1)