different result by textLayout.swc version.

Hi

I wrote simple code by using TLF.
It generated three text box with different textAlign.
But, the result of the same code is different by the textLayout.swc version.

Why is the result different?

Tried textLayout.swc is bundled with...
Flex 4 SDK_4.0.0.7219
Flex 4 SDK_4.0.0.9437

OS: WinXP SP2
SDK: ver 3.4
Tool: Flex Builder 3

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
      creationComplete="init()">
     <mx:Script>
          <![CDATA[
               import flashx.textLayout.formats.TextLayoutFormat;
               import flashx.textLayout.container.ContainerController;
               import flashx.textLayout.elements.SpanElement;
               import flashx.textLayout.elements.ParagraphElement;
               import flashx.textLayout.elements.TextFlow;
               import flashx.textLayout.elements.Configuration;
               
               private function init():void
               {
                    var textBox1:Sprite = createTextBox("left");
                    textBox1.x = 300;
                    textBox1.y = 100;
                    this.rawChildren.addChild(textBox1);
                    
                    var textBox2:Sprite = createTextBox("center");
                    textBox2.x = 300;
                    textBox2.y = 250;
                    this.rawChildren.addChild(textBox2);
                    
                    var textBox3:Sprite = createTextBox("right");
                    textBox3.x = 300;
                    textBox3.y = 400;
                    this.rawChildren.addChild(textBox3);
               }
               
               private function createTextBox(value:String):Sprite
               {
                    var rect:Rectangle = new Rectangle(0,0,300,100);
                    
                    var sprite:Sprite = new Sprite();
                     sprite.graphics.lineStyle (1, 0x000000, 1.0);
                    sprite.graphics.beginFill (0xFF0000, 1.0);
                    sprite.graphics.drawRect  (rect.x, rect.y , rect.width , rect.height);
                    
                    var tlFormat:TextLayoutFormat = new TextLayoutFormat();
                    tlFormat.textAlign = value;
                    tlFormat.color = 0x000000;
                    tlFormat.fontSize = 50;
                    
                    var config:Configuration = new Configuration();
                    config.textFlowInitialFormat = tlFormat;
                    
                    var textFlow:TextFlow = new TextFlow(config);
                    
                    var p:ParagraphElement = new ParagraphElement();
                    var s:SpanElement = new SpanElement();
                    s.text = value;
                    p.addChild(s);
                    textFlow.addChild(p);
                    
                    textFlow.flowComposer.addController(new ContainerController(sprite, rect.width,rect.height));
                    
                    textFlow.flowComposer.updateAllControllers();
                    
                    return sprite;
               }
               
          ]]>
     </mx:Script>
</mx:Application>

textLayout.swc is bundled with  SDK_4.0.0.7219	textLayout.swc is bundled with SDK_4.0.0.9437