Sorry for the inconvenience. Known Navigation header breakage, its being "rebuilt."
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.
Installation Progress Screen/9.2
(Sorry for the inconvenience)
This screen, seen in Figure 3.10a, uses a progress bar and messages so you can watch the installation's progress.
Figure 3.10a: The Installation Progress Screen Allows you to View the Status of the Installation
How long the installation takes depends upon the speed of your hardware, the installation type you selected, and whether or not any additional software components will be installed. A typical installation takes between 15 and 30 minutes.