Sorry for the inconvenience. Known Navigation header breakage, its being "rebuilt" but forward nav should be ok now.
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.
Pages of the PC-BSD handbook
This category has the following 13 subcategories, out of 13 total.
Pages in category ‘Handbook’
The following 200 pages are in this category, out of 1,106 total.(previous 200) (next 200)