 		
 		public function appendUniformScale(scale : Number) : Matrix4x4
 		{
+			_invalidComponents = COMPONENT_ALL;
 			_matrix.appendScale(scale, scale, scale);
 			
 			if (!_locked)

		
		public function prepend(m : Matrix4x4) : Matrix4x4
		{
			_matrix.prepend(m._matrix);
			
			if (!_locked)

									 y	: Number = 1.,
									 z	: Number = 1.) : Matrix4x4
		{
			_invalidComponents = COMPONENT_ALL;
			_matrix.prependScale(x, y, z);
			
			if (!_locked)
