/etc/rc.d/rc.sysinit incorrectly mounts /proc according to /etc/fstab
none /proc proc defaults,gid=90 0 0
When mounted, /proc is not mounted gid=90, but it is mounted with
default /proc permissions.
Mount command that works:
mount -t proc -o gid=90 /proc /proc
We probably aren't going to change this at this point; you're
free to edit /etc/rc.d/rc.sysinit to add the gid field to