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.
PC-BSD® 7.2 TODO
PC-BSD 7.2 Task List
The following items are features or bugs that we wish to get fixed and into PC-BSD 7.2
Base System Software
|Merge in FreeBSD 7.2-Release||DONE|
|Update to KDE 4.2.3||DONE|
Fix bug upgrading from 7.0.x when the user has custom partition setup or uses ZFS