Version 4.6 is now production-ready. Download it now to take advantage of some of these new features:

• ObjectSet (the object returned by db4o queries) now implements System.Collections.IList (.NET) and java.util.List and java.util.Iterator (Java). This makes result processing much nicer by using a For-Each loop.
• The query processor was considerably tuned. Most users should see an improvement in query execution speed when using indexing and deep object graphs.

On the bleeding edge, our engineers have been hard at work on the 5.0 Milestone 2 release. If you are using the M1 release, or are using .NET 2.0, please upgrade as soon as possible. Many bugs were fixed and performance is much-improved.