Alpha property not working on TextField when publish for Reader 9

Question

Hi,
I have a movie that is working fine when I publish for Reader 10, but when I publish for Reader 9, the code that assigns an alpha property to my TextFields stops working. I have a previous movie, which I probably did in CS4, that uses similar code to fade in and out TextFields. It was published for Reader 9 and works fine.Is it possible that something has changed in CS5 (note, I'm not using TLF text boxes, only dynamic TextFields)?
Here's an example of the code I'm using:
stop();
import fl.transitions.Tween;
import fl.transitions.TweenEvent;
import fl.transitions.easing.*;
import flash.events.*;
import flash.text.*;
import flash.text.TextFormat;
import flash.utils.Timer;
import flash.display.MovieClip;
import flash.display.Sprite;
var txtFormat1:TextFormat = new TextFormat();
txtFormat1.font = "Optima";
txtFormat1.color = 0x000000;
txtFormat1.bold = false;
txtFormat1.size = 16;
txtFormat1.leading = 2;
var subtitle:TextField = new TextField();
subtitle.autoSize = TextFieldAutoSize.CENTER;
subtitle.selectable = false;
subtitle.defaultTextFormat = txtFormat1;
var fadeInSubtitle:Tween;
addChild(subtitle);
subtitle.x = stage.stageWidth / 2 - subtitle.width / 2;
subtitle.y = stage.stageHeight / 2 - subtitle.height / 2;
subtitle.alpha = 0;
subtitle.text = "What is the most important question in";
fadeInSubtitle = new Tween(subtitle,"alpha",None.easeNone,0,1,3,true);

Answer 1

Thanks.
Just curious: Is there a reason why the alpha on the TextFields worked without embedding fonts when publishing for Flash Player 10? Does it handle text, even when it's not TLF, differently than Flash Player 9?