As we seems to be using the glibc 2.8 snapshots, so where are some newer ons here. Not sure if this is a version bump
Download glibc-2.8_p20080602  and glibc-2.8_p20080922 tarballs, unpack them to separate directories and run `diff -ru` on these directories to check if there is any difference.
 ebuild /usr/portage/sys-libs/glibc/glibc-2.8_p20080602.ebuild fetch
'diff -ru glibc-2.8-20080602 glibc-2.8-20080929' shows no changes...