Still having Serialization issues in 4.5.1f3

Hey guys,

According to the following release note, it is my understanding that we should be able to serialize Vector3s and other such structs as of Unity 4.5.

"Scripting: Structs with System.Serializable attribute can now be serialized. Also, fields of AnimationCurve[] and double[] now get serialised."

and the following debug line returns True...

 Debug.Log("This type is serializable: " + System.Attribute.IsDefined(typeof(Vector3), typeof(System.SerializableAttribute))); 

My problem is: When I run the following Save scipt ... https://github.com/antonholmquist/easy-serializer-unity

I still get the following error, because the class i'm trying to save contains a vector3.

 "SerializationException: Type UnityEngine.Vector3 is not marked as Serializable."

To test it out, I marked the Vector3 as [System.NonSerialized] and it works just fine.

Thanks!