Many tools in /bin, /sbin, and /usr/bin belong to the group 'portage' (250) rather than group 0. Disk Utility.app complains about this problem during a "Verify/Repair Disk Permissions" action. The following tools are listed: ... Group differs on ./bin/[, should be 0, group is 250 Group differs on ./bin/cat, should be 0, group is 250 Group differs on ./bin/chmod, should be 0, group is 250 Group differs on ./bin/cp, should be 0, group is 250 Group differs on ./bin/date, should be 0, group is 250 Group differs on ./bin/dd, should be 0, group is 250 Group differs on ./bin/df, should be 5, group is 250 Group differs on ./bin/echo, should be 0, group is 250 Group differs on ./bin/expr, should be 0, group is 250 Group differs on ./bin/link, should be 0, group is 250 Group differs on ./bin/ln, should be 0, group is 250 Group differs on ./bin/ls, should be 0, group is 250 Group differs on ./bin/mkdir, should be 0, group is 250 Group differs on ./bin/mv, should be 0, group is 250 Group differs on ./bin/pwd, should be 0, group is 250 Group differs on ./bin/rm, should be 0, group is 250 Group differs on ./bin/rmdir, should be 0, group is 250 Group differs on ./bin/sleep, should be 0, group is 250 Group differs on ./bin/stty, should be 0, group is 250 Group differs on ./bin/sync, should be 0, group is 250 Group differs on ./bin/test, should be 0, group is 250 Group differs on ./bin/unlink, should be 0, group is 250 ... Group differs on ./sbin/mknod, should be 0, group is 250 Group differs on ./usr/bin/basename, should be 0, group is 250 Group differs on ./usr/bin/chgrp, should be 0, group is 250 Group differs on ./usr/bin/cksum, should be 0, group is 250 Group differs on ./usr/bin/comm, should be 0, group is 250 Group differs on ./usr/bin/cut, should be 0, group is 250 Group differs on ./usr/bin/dirname, should be 0, group is 250 Group differs on ./usr/bin/du, should be 0, group is 250 Group differs on ./usr/bin/env, should be 0, group is 250 Group differs on ./usr/bin/expand, should be 0, group is 250 Group differs on ./usr/bin/false, should be 0, group is 250 Group differs on ./usr/bin/fmt, should be 0, group is 250 Group differs on ./usr/bin/fold, should be 0, group is 250 Group differs on ./usr/bin/groups, should be 0, group is 250 Group differs on ./usr/bin/head, should be 0, group is 250 Group differs on ./usr/bin/hexdump, should be 0, group is 250 Group differs on ./usr/bin/id, should be 0, group is 250 Group differs on ./usr/bin/install, should be 0, group is 250 Group differs on ./usr/bin/join, should be 0, group is 250 Group differs on ./usr/bin/logname, should be 0, group is 250 Group differs on ./usr/bin/mkfifo, should be 0, group is 250 Group differs on ./usr/bin/nice, should be 0, group is 250 Group differs on ./usr/bin/nohup, should be 0, group is 250 Group differs on ./usr/bin/od, should be 0, group is 250 Group differs on ./usr/bin/paste, should be 0, group is 250 Group differs on ./usr/bin/pr, should be 0, group is 250 Group differs on ./usr/bin/printenv, should be 0, group is 250 Group differs on ./usr/bin/printf, should be 0, group is 250 Group differs on ./usr/bin/readlink, should be 0, group is 250 Group differs on ./usr/bin/sort, should be 0, group is 250 Group differs on ./usr/bin/split, should be 0, group is 250 Group differs on ./usr/bin/stat, should be 0, group is 250 Group differs on ./usr/bin/su, should be 0, group is 250 Group differs on ./usr/bin/sum, should be 0, group is 250 Group differs on ./usr/bin/tail, should be 0, group is 250 Group differs on ./usr/bin/tee, should be 0, group is 250 Group differs on ./usr/bin/touch, should be 0, group is 250 Group differs on ./usr/bin/tr, should be 0, group is 250 Group differs on ./usr/bin/true, should be 0, group is 250 Group differs on ./usr/bin/tsort, should be 0, group is 250 Group differs on ./usr/bin/tty, should be 0, group is 250 Group differs on ./usr/bin/uname, should be 0, group is 250 Group differs on ./usr/bin/unexpand, should be 0, group is 250 Group differs on ./usr/bin/uniq, should be 0, group is 250 Group differs on ./usr/bin/uptime, should be 0, group is 250 Group differs on ./usr/bin/users, should be 0, group is 250 Group differs on ./usr/bin/w, should be 0, group is 250 Group differs on ./usr/bin/wc, should be 0, group is 250 Group differs on ./usr/bin/who, should be 0, group is 250 Group differs on ./usr/bin/whoami, should be 0, group is 250 Group differs on ./usr/bin/yes, should be 0, group is 250 ... Group differs on ./usr/sbin/chown, should be 0, group is 250 Group differs on ./usr/sbin/chroot, should be 0, group is 250 # emerge --info Portage 2.0.51.22-r3 (default-darwin/macos/10.4, gcc-4.0.1, libsystem-7.1-r0, 8.4.0 Power Macintosh) ================================================================= System uname: 8.4.0 Power Macintosh powerpc macos-20041118 distcc 2.18.3-Apple powerpc-apple-darwin8.0 (protocols 1 and 2) (default port 3632) [disabled] dev-lang/python: [Not Present] sys-apps/sandbox: [Not Present] sys-devel/autoconf: [Not Present] sys-devel/automake: [Not Present] sys-devel/binutils: [Not Present] sys-devel/libtool: [Not Present] virtual/os-headers: 7.1 ACCEPT_KEYWORDS="ppc-macos ~ppc-macos" AUTOCLEAN="yes" CBUILD="powerpc-apple-darwin8" CFLAGS="-O2 -pipe" CHOST="powerpc-apple-darwin8" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig collision-protect distlocks sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="ppc bzip2 curl emacs emboss expat libwww nls opengl pcre png ppc-macos python ssl tetex unicode zlib userland_Darwin kernel_Darwin elibc_Darwin" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Normally those files are not installed by portage, unless you disabled collision-protect. In the latter case you're on the progressive profile. Closing as invalid, as I think this is not really caused by 'normal' usage... :)
I didn't think I was using a progressive profile: profiles/default-darwin/macos/10.4. Collision-protect is enabled. Something screwy happened. Even if I did use a progressive profile, shouldn't the ownership on these files be changed to g:root regardless? I'll poke this one a bit more and post back if I find anything.