The first fix was for a bug when a field had multiple values and was a i18n field than only the first value was copied to the i18n field. This may resulted in missing data in the returned fields.
The second fix was regarding the REST API V2 (currently in beta). There was a problem with quoting in the JSON request.
We added a new feature where the field names and some more data is now stored in Solr instead of zookeeper. This will lower interactions with the zookeeper (especially write calls) and improves stability.