I can't find portage snapshots newer than portage-20160512.tar.xz on any mirror I tried Reproducible: Always mirrors with old snapshots include http://trumpetti.atm.tut.fi/gentoo/snapshots/ http://ftp.snt.utwente.nl/pub/os/linux/gentoo/snapshots/ ftp://ftp.vectranet.pl/gentoo/snapshots/
This is caused by the hardware issue on dipper: https://infra-status.gentoo.org/notice/20160513-dipper Until dipper gets fixed I doubt infra will be able to provide newer portage snapshots.
portage-20160516 should go out shortly, followed quickly by portage-20160517. The deltas might be screwy, but not much we can do.
Can confirm this is indeed fixed now. Thanks Robin, ATTAMAN!