FYI, fileutils 3.13 is quite old, since it has been released in 1996. I wonder how it was possible that such an old piece of software were installed in Fedora 8. Moreover, the immutable bit could have prevented the installation of a recent version of /bin/ls (coming from coreutils), whereas a new version of the manual page were actually installed. The --human-readable option was introduced in fileutils 4.0 two years later. Maybe I'm a bit paranoid, but if I had an ancient /bin/ls on my system I would investigate from were it came from.