The recent 1.5 release of OrientDB just got a hotfix release.
You can see the fixes on the OrientDB GitHub page. Seven bugs have been fixed for this release. For those of you unfamiliar with OrientDB, here's the full description:
OrientDB is an Open Source NoSQL DBMS with the features of both Document and Graph DBMSs. It's written in Java and it's amazingly fast: It can store up to 150,000 records per second on common hardware. Even for a Document based database the relationships are managed as in Graph Databases with direct connections among records. You can traverse parts of, or entire, trees and graphs of records in a few milliseconds. Supports schema-less, schema-full and schema-mixed modes. Has a strong security profiling system based on user and roles and supports SQL amongst the query languages. Thanks to the SQL layer, it's straightforward to use for people skilled in the Relational world.