Quoting David Mackintosh David.Mackintosh@xdroop.com:
[root@urquell2 ~]# ls -ld / /var /var/lib /var/lib/mysql drwxrwx--- 32 cvs 500 4096 Oct 30 16:40 /
# chmod 755 / # chown root:root /
BTW, what package were you installing from centosplus? If this wrecked permissions and ownership on root directory is result of a package from centosplus, than it needs fixing ASAP!