It appears that when errata rpms were added on 7/22 to ftp://ftp.scientificlinux.org/linux/scientific/40rolling/i386/errata/SL/RPMS/ the repodata was not rebuilt. These same errata seem not to have been put in ftp://ftp.scientificlinux.org/linux/scientific/41/i386/errata/SL/RPMS/