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.
Become an Advocate/9.2
So you love PC-BSD? Why not tell the world about it? Your family, your friends, fellow students and colleagues? You won't be the only one that likes a free, virus-free, spyware-free and adware-free operating system. You can burn a couple of DVDs and pass them out.
Webmasters and bloggers can put a Spread PC-BSD button on their site.