[arch-general] Why doesn't the evolution package version follow the stable release version from upstream?

Why is the Evolution package in extra evolution 3.12.3-1, https://www.archlinux.org/packages/extra/x86_64/evolution/ , when the current stable version from upstream still is 3.12.2? On Wed, 2014-06-25 at 20:07 +0100, at evolution-list@gnome.org Patrick O'Callaghan wrote:

the latest stable release currently being 3.12.2

"The latest stable release tarballs were uploaded on May 12, 2014: evolution-3.12.2.tar.xz (NEWS) evolution-data-server-3.12.2.tar.xz (NEWS)" - https://wiki.gnome.org/Apps/Evolution#Get_the_Source_Code