With the update to pacman-3.2.1-2, we have split the mirrorlist into the pacman-mirrorlist package. This will allow us to push more frequent updates to the mirrorlist, instead of only updating it with pacman releases. As part of this update, your current /etc/pacman.d/mirrorlist file will be saved as mirrorlist.pacorig and the default mirrorlist put in its place. Remember to merge these files in order to keep using your mirror(s) of choice. URL: http://archlinux.info/news/427/