I have the following class structures:

public class NodeOwner : ScriptableObject
{
    public Node Root = new Node();
}

[System.Serializable]
public class Node
{
   public NodeType Type = NodeType.None;
   public Node[] Children = null;
}

public enum NodeType
{
   None,
   Type1,
   Type2
}

I have an editor script to create an instance of the NodeOwner. When I select the asset, the Root node appear fine in the inspector, with its Type set to None, but when I add children, their type defaults to 0 and I cannot choose node types via the inspector.

All help appreciated. I found this post but this doesn't seem to work for me:

http://answers.unity3d.com/questions/61073/enum-drop-down-menu-in-inspector-for-nested-arrays.html

Thanks Bovine