Node follows a even/odd version scheme where even releases are stable and odd releases are unstable. v0.9.0 is just the first release of the unstable v0.9 series.
The versioning scheme is unfortunate because it confuses people. After Node 1.0 we'll switch a less confusing version system.
The versioning scheme is unfortunate because it confuses people. After Node 1.0 we'll switch a less confusing version system.