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.
Pkgng and pc-metapkgmanager/9.2
(Sorry for the inconvenience)
Beginning in February, 2013,
PC-BSD® also provides a custom command, pc-pkg which is a small wrapper to pkg in order to improve its functionality. pc-pkg will automatically use the integrated aria2 downloader when used with the install or upgrade flags, which can significantly reduce download speeds over a slow link.