Say no to updating pacman first and read the news. If you choose to reinstall use the net iso or core-remote it will install only up to date packages, do not use the core iso's cache.
I did try saying no to pacman, but that didn't help.Then I installed core/glibc 2.16 first, it did work fine, then I could upgrade
pacman and almost everything. There were only 2-3 packages that I had to remove by hand (heimdal is one I remember) and reinstall later. -- дамјан
