Sorry for the inconvenience. Known Navigation header breakage of “Previous:” and “Next:” links, the Table Of Contents may be the solution for those.
However, unfortunately, the Table of contents may also be broken, and there may be other unforeseen breakage primarily in the handbook portion of the wiki.
Presently the 10.1 Table Of Contents is being "reconstructed" becoming incrementally fixed while the other handbook versions may have various breakage.
FreeBSD Handbook and FAQ/9.2
PC-BSD has FreeBSD as it's underlying operating system, so everything in the FreeBSD Handbook and FreeBSD FAQ applies to PC-BSD as well. Both are very comprehensive and cover nearly every task you can accomplish on a FreeBSD system. They are also an excellent resource for learning how things work "under the hood" of your PC-BSD system.