Packages that aren't from AUR have been moved out of the [aur] repository and into a new [alarm] repo. There are no other changes to the packages except their location on the server and mirrors, and within the PKGBUILDs GitHub repo. These packages are those that are customized versions of upstream packages and creations of our own or of users.
Pacman has been bumped to a new version to reflect this change in pacman.conf. If changes have been made to the pacman.conf on existing installations, the new version will be saved as pacman.conf.pacnew and the new repository will not sync until the changes are merged.