Amazon RDS now supports IPv6 for publicly accessible databases, allowing dual-stack connectivity with IPv4. This update helps users scale applications beyond IPv4 limits and facilitates a smoother transition to IPv6. The feature is available in all AWS regions that support IPv6 for private databases.

AWS's Amazon RDS for PostgreSQL has been found to exhibit Long Fork and G-nonadjacent cycles that violate Snapshot Isolation, indicating a weaker consistency model than standard PostgreSQL. This issue arises from discrepancies in how primary and secondary nodes handle transaction visibility. Users are advised to assess their transaction structures to avoid potential anomalies.