Several binaries in /bin (csh, dir, ls, more, nano, pstree, pstree.x11, rnano, tcsh, and vdir) are linked with /lib/libncurses, which in turn is linked with /usr/lib/gpm. Since the binaries in /bin link to /usr/lib/libgpm, though, they are unavailable in single user mode and in boot scripts before /usr is mounted. It seems that libgpm (sys-libs/gpm) should be moved to /lib.
*** This bug has been marked as a duplicate of 80403 ***