I opened the inquiry about MonoBehaviour inside the namespace.
The problem is that if your MonoB has a method with the default parameters.
It cannot be attached.
This is really annoying problem for me but the inquiry without any answer about a week.
Is anybody there? Maybe I was not so clear, please let me know.
MonoBehaviour inside namespace is the new feature of Unity according to release notes: http://unity3d.com/unity/whats-new/unity-4.0 (Scripting: MonoBehaviours can now be inside namespaces.)