Conductor restricts private image views, which stops "Global Image Administrator" users from importing images. An update for Conductor adds provider-based permissions to "Global Image Administrator" users, which adds the ability to import. Run the update on CloudForms hosts with:
# rake dc:upgrade
Note: this update corrects the underlying problem. To fix existing setups, however, it is simpler to a user level script on affected systems. See BZ#828317 notes below for details.