Advanced Antialias in combination with a lot of text does not show well

Question

I am using embedded fonts in combination with antiAliasType ADVANCED which gives good results for smaller fontsizes.
But if the textField contains a lot of text (> 20000 characters) then part of the text is simply NOT shown. So the first couple of hundreds of lines are shown, then a couple of hundereds are not, then the next again are shown and so on. I have experimented with different values of the sharpness, but without results. Anyone any idea?
Thanks!
_textField.antiAliasType=AntiAliasType.ADVANCED
_textField.sharpness=300

Answer 1

I cannot reproduce this issue with neither dynamic nor authoring font embedding approach. All text displays fine.
You may need to make sure that font you embed has all the characters first.
The code I used:
In Flash IDE (given Arial is embedded):
init();
function init():void
     var tf:TextField = new TextField();
     tf.multiline = tf.wordWrap = true;
     tf.width = 1200;
     tf.autoSize = "left";
     tf.embedFonts = true;
     tf.antiAliasType = AntiAliasType.ADVANCED;
     tf.sharpness = 300;
     tf.defaultTextFormat = new TextFormat("Arial", 9);
     tf.text = "";
     addChild(tf);
     while (tf.text.length < 20000) {
          tf.appendText(" " + String.fromCharCode(33 + Math.random() * 93));
And as a document class with Embed metatag:
package
     import flash.display.Sprite;
     import flash.text.AntiAliasType;
     import flash.text.Font;
     import flash.text.TextField;
     import flash.text.TextFormat;
     public class LargeText extends Sprite
          [Embed(systemFont="Arial",fontName="_arial",mimeType="application/x-font-truetype",embedAsCFF="false")]
          private var font:Class;
          public function LargeText()
               init();
          private function init():void
               var tf:TextField = new TextField();
               tf.multiline = tf.wordWrap = true;
               tf.width = 1200;
               tf.autoSize = "left";
               tf.embedFonts = true;
               tf.antiAliasType = AntiAliasType.ADVANCED;
               tf.sharpness = 300;
               tf.defaultTextFormat = new TextFormat("_arial", 9);
               tf.text = "";
               addChild(tf);
               while (tf.text.length < 20000)
                    tf.appendText(" " + String.fromCharCode(33 + Math.random() * 93));