Today we're pleased to release Neo4j 1.9.3. This is a bugfix release in the 1.9.x series and has no new features (though it does restore an old way of registering unmanaged extensions with the server).
If you're on an earlier 1.9 release then you're strongly encouraged to upgrade (which can be performed without downtime in an HA cluster). You can download it from the neo4j.org web site.
Author of Graph Databases (O'Reilly), Neo4j engineer, and Doctor Who aficionado.