[КорДум]

Вот так точно работает:

public class TahomaFont {
	[Embed(source = "../../../../lib/TAHOMA.TTF", fontName = "Tahoma", 
	mimeType = "application/x-font", advancedAntiAliasing="true", embedAsCFF="false")]
	private var font:Class;
 
	public static const NAME:String = "Tahoma";
}