The merge of gnome-unstable with core/extra has been finished. Packages should be available on your mirror soon, which is the moment to remove the gnome-unstable repository from pacman.conf. The gnome-unstable repository will get removed tomorrow. Note that this release comes with a new version of policykit, which installs side by side with the old version. Any policy set in the previous version will not apply to the new version, and any GUI tools available for the old version will not apply policies to the new version. The use of ConsoleKit is advised to get full access to all features in this release.