If you are a user of biblatex-biber from [pcr] you should upgrade to biber now that it's provided as a [community] package. This means uninstalling the old package (and its dependents) through pacman; the new one has a different name and you won't get it as part of a system upgrade. texlive-bibtexextra includes the functionality of biblatex-biber's dependent: biblatex.
biblatex-biber deprecated in favor of biber - manual intervention required
2016-08-31 - Isaac David