The validation rule `default_locale` without `locales` is matching the wrong way around - it should be okay to have a default locale and no other locales, but its not okay to have locales listed and no default.
Yep, this is what the spec says: http://mozilla.github.com/webapps-spec/#properties
Any chance we can get this fixed before the next push? Its filling up the re-review queue with false reviews.
https://github.com/mozilla/amo-validator/commit/289e398 Thanks, Andrew!