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.
This will need to be adjusted to a new hash checking program when sha256 replaces md5. Md5deep at http://md5deep.sourceforge.net/ is compatible with Windows(7, Vista, XP, 2003, 2000), Mac OS X(DarwinPorts, Fink), Linux (Ubuntu, Fedora, Gentoo, Slackware), and FreeBSD, plus it has been updated recently. --Tigersharke 19:58, 7 April 2011 (PDT)
On (my) Linux the command line tool is md5sum. Maybe the text can be changed to "md5 or md5sum".
✔Thanks for the comment, page adjusted.--Tigersharke 03:36, 1 February 2012 (PST)