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.
MythTV is an open source software digital video recorder (DVR) that is an alternative to Tivo or Windows Media Center. It allows you to pause and rewind live TV shows, skip commercials, schedule TV show recordings, and control a settop box using an infrared remote or firewire. In order to use MythTV, you will need a video capture card. Hardware requirements are described on the MythTV Wiki.