diff --git a/core/method_bind.h b/core/method_bind.h
index d32050cc5d2..49c64bd11c3 100644
--- a/core/method_bind.h
+++ b/core/method_bind.h
@@ -98,7 +98,7 @@ struct VariantCaster<m_enum> {\
 #define CHECK_ARG(m_arg)\
 	if ((m_arg-1)<p_arg_count) {\
 		Variant::Type argtype=get_argument_type(m_arg-1);\
-		if (!Variant::can_convert(p_args[m_arg-1]->get_type(),argtype)) {\
+		if (!Variant::can_convert_strict(p_args[m_arg-1]->get_type(),argtype)) {\
 			r_error.error=Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;\
 			r_error.argument=m_arg-1;\
 			r_error.expected=argtype;\
diff --git a/core/variant.cpp b/core/variant.cpp
index c06afb2984c..f49b202a5b6 100644
--- a/core/variant.cpp
+++ b/core/variant.cpp
@@ -214,7 +214,7 @@ bool Variant::can_convert(Variant::Type p_type_from,Variant::Type p_type_to) {
 			static const Type valid[]={
 				INT,
 				REAL,
-				//STRING,
+				STRING,
 				NIL,
 			};
 
@@ -225,7 +225,7 @@ bool Variant::can_convert(Variant::Type p_type_from,Variant::Type p_type_to) {
 			static const Type valid[]={
 				BOOL,
 				REAL,
-				//STRING,
+				STRING,
 				NIL,
 			};
 
@@ -237,7 +237,7 @@ bool Variant::can_convert(Variant::Type p_type_from,Variant::Type p_type_to) {
 			static const Type valid[]={
 				BOOL,
 				INT,
-				//STRING,
+				STRING,
 				NIL,
 			};
 
@@ -258,12 +258,12 @@ bool Variant::can_convert(Variant::Type p_type_from,Variant::Type p_type_to) {
 		case MATRIX32: {
 
 
-			static const Type invalid[]={
+			static const Type valid[]={
 				TRANSFORM,
 				NIL
 			};
 
-			invalid_types=invalid;
+			valid_types=valid;
 		} break;
 		case QUAT: {
 
@@ -299,6 +299,256 @@ bool Variant::can_convert(Variant::Type p_type_from,Variant::Type p_type_to) {
 
 		} break;		
 
+		case COLOR: {
+
+			static const Type valid[] = {
+				//STRING,
+				//INT,
+				NIL,
+			};
+
+			valid_types = valid;
+
+		} break;
+
+		case _RID: {
+
+			static const Type valid[]={
+				OBJECT,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case OBJECT: {
+
+			static const Type valid[]={
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case NODE_PATH: {
+
+			static const Type valid[]={
+				STRING,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case ARRAY: {
+
+
+			static const Type valid[]={
+				RAW_ARRAY,
+				INT_ARRAY,
+				STRING_ARRAY,
+				REAL_ARRAY,
+				COLOR_ARRAY,
+				VECTOR2_ARRAY,
+				VECTOR3_ARRAY,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+			// arrays
+		case RAW_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case INT_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+			valid_types=valid;
+		} break;
+		case REAL_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case STRING_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+			valid_types=valid;
+		} break;
+		case VECTOR2_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+			valid_types=valid;
+
+		} break;
+		case VECTOR3_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+			valid_types=valid;
+
+		} break;
+		case COLOR_ARRAY: {
+
+			static const Type valid[]={
+				ARRAY,
+				NIL
+			};
+
+			valid_types=valid;
+
+		} break;
+		default: {}
+	}
+
+
+	if (valid_types) {
+
+		int i=0;
+		while(valid_types[i]!=NIL) {
+
+			if (p_type_from==valid_types[i])
+				return true;
+			i++;
+		}
+	} else if (invalid_types) {
+
+
+		int i=0;
+		while(invalid_types[i]!=NIL) {
+
+			if (p_type_from==invalid_types[i])
+				return false;
+			i++;
+		}
+	}
+
+	return false;
+
+}
+
+bool Variant::can_convert_strict(Variant::Type p_type_from,Variant::Type p_type_to) {
+
+	if (p_type_from==p_type_to)
+		return true;
+	if (p_type_to==NIL && p_type_from!=NIL) //nil can convert to anything
+		return true;
+
+	if (p_type_from == NIL) {
+		return (p_type_to == OBJECT);
+	};
+
+	const Type *valid_types=NULL;
+	const Type *invalid_types=NULL;
+
+	switch(p_type_to) {
+		case BOOL: {
+
+			static const Type valid[]={
+				//INT,
+				//REAL,
+				//STRING,
+				NIL,
+			};
+
+			valid_types=valid;
+		} break;
+		case INT: {
+
+			static const Type valid[]={
+				//BOOL,
+				REAL,
+				//STRING,
+				NIL,
+			};
+
+			valid_types=valid;
+
+		} break;
+		case REAL: {
+
+			static const Type valid[]={
+				//BOOL,
+				INT,
+				//STRING,
+				NIL,
+			};
+
+			valid_types=valid;
+
+		} break;
+		case STRING: {
+
+
+			static const Type valid[]={
+				NODE_PATH,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case MATRIX32: {
+
+
+			static const Type valid[]={
+				TRANSFORM,
+				NIL
+			};
+
+			valid_types=valid;
+		} break;
+		case QUAT: {
+
+			static const Type valid[]={
+				MATRIX3,
+				NIL
+			};
+
+			valid_types=valid;
+
+		} break;
+		case MATRIX3: {
+
+			static const Type valid[]={
+				QUAT,
+				NIL
+			};
+
+			valid_types=valid;
+
+
+		} break;
+		case TRANSFORM: {
+
+			static const Type valid[]={
+				MATRIX32,
+				QUAT,
+				MATRIX3,
+				NIL
+			};
+
+			valid_types=valid;
+
+		} break;
+
 		case COLOR: {
 
 			static const Type valid[] = {
diff --git a/core/variant.h b/core/variant.h
index 85c7b92c0da..5f338ef667f 100644
--- a/core/variant.h
+++ b/core/variant.h
@@ -165,7 +165,8 @@ public:
 
 	_FORCE_INLINE_ Type get_type() const { return type; }
 	static String get_type_name(Variant::Type p_type);
-	static bool can_convert(Type p_type_from,Type p_type_to);
+	static bool can_convert(Type p_type_from, Type p_type_to);
+	static bool can_convert_strict(Type p_type_from, Type p_type_to);
 
 
 
diff --git a/demos/2d/platformer/enemy.gd b/demos/2d/platformer/enemy.gd
index b4e70477a80..a264cd0cffa 100644
--- a/demos/2d/platformer/enemy.gd
+++ b/demos/2d/platformer/enemy.gd
@@ -56,7 +56,7 @@ func _integrate_forces(s):
 					state=STATE_DYING
 					#lv=s.get_contact_local_normal(i)*400
 					s.set_angular_velocity(sign(dp.x)*33.0)
-					set_friction(true)
+					set_friction(1)
 					cc.disable()
 					get_node("sound").play("hit")
 					
diff --git a/demos/3d/platformer/enemy.gd b/demos/3d/platformer/enemy.gd
index 1d0e0315d92..cbbb2fe725c 100644
--- a/demos/3d/platformer/enemy.gd
+++ b/demos/3d/platformer/enemy.gd
@@ -45,7 +45,7 @@ func _integrate_forces(state):
 				state.set_angular_velocity( -dp.cross(up).normalized() *33.0)
 				get_node("AnimationPlayer").play("impact")
 				get_node("AnimationPlayer").queue("explode")
-				set_friction(true)
+				set_friction(1)
 				cc.disabled=true
 				get_node("sound").play("hit")
 				return
diff --git a/scene/main/node.h b/scene/main/node.h
index aeada3c5bb8..4d0a84d3472 100644
--- a/scene/main/node.h
+++ b/scene/main/node.h
@@ -170,6 +170,7 @@ public:
 		NOTIFICATION_PROCESS = 17,
 		NOTIFICATION_PARENTED=18,
 		NOTIFICATION_UNPARENTED=19,
+		NOTIFICATION_INSTANCED=20,
 	};
 			
 	/* NODE/TREE */			
diff --git a/scene/resources/packed_scene.cpp b/scene/resources/packed_scene.cpp
index 9f36510739b..a1cb1205e5c 100644
--- a/scene/resources/packed_scene.cpp
+++ b/scene/resources/packed_scene.cpp
@@ -182,6 +182,8 @@ Node *PackedScene::instance(bool p_gen_edit_state) const {
 
 	if (get_path()!="" && get_path().find("::")==-1)
 		s->set_filename(get_path());
+
+	s->notification(Node::NOTIFICATION_INSTANCED);
 	return ret_nodes[0];
 
 }