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.
Using a Rolling Release/9.2
(Sorry for the inconvenience)
Beginning in February, 2013,
To install a rolling release, select the desired media from this FTP server. Rolling releases will always have a date in the media name.
To upgrade a 9.1-RELEASE system to a rolling release, follow the instructions in this blog post.