Linq2Couchbase v1.1.0, the official Linq provider for Couchbase Server and N1QL, introduces several new features, improvements, and bug fixes over its previous version. Key updates include compatibility with custom serializers through the new IExtendedTypeSerializer interface, support for various date functions and operations on arrays, as well as enumeration and GUID constants in queries. The release also enhances the handling of UNION and UNION ALL statements, supports asynchronous LINQ queries, and implements experimental change tracking via proxy objects for batch document mutations. Additionally, it improves error handling and inline XML documentation, and updates dependencies like Relinq to version 2.0 using ILRepack for easier integration with projects like Entity Framework 7. This community-driven project encourages contributions and feedback through its GitHub and Jira platforms.