So far as I can tell, some of the images that come with the handbook are no longer linked to and so probably not needed: advanced-networking/ isdn-bus.png isdn-twisted-pair.png natd.png net-routing.png bsdinstall/ bsdinstall-boot-loader-menu.png bsdinstall-part-guided-manual.png security/ ipsec-crypt-pkt.png ipsec-encap-pkt.png ipsec-network.png ipsec-out-pkt.png
The images are not used in the english version of the Handbook, that's correct. But other languages use the images in their localized version of the Handbook.