This code produces an error on iOS with AIR 25 + 26 (beta)

FilterExperiments.as

// =================================================================================================
//
//	Starling Framework
//	Copyright Gamua GmbH. All Rights Reserved.
//
//	This program is free software. You can redistribute and/or modify it
//	in accordance with the terms of the accompanying license agreement.
//
// =================================================================================================

package starling
{
    import starling.display.Canvas;
    import starling.display.Sprite;
    import starling.filters.FragmentFilter;

    public class FilterExperiments extends Sprite
    {
        public function FilterExperiments()
        {
            var canvas:Canvas = new Canvas();
            canvas.beginFill(0xff0000);
            canvas.drawEllipse(100, 50, 200, 100);
            canvas.endFill();
            canvas.x = canvas.y = 100;
            addChild(canvas);

            canvas.filter = new FragmentFilter();
            canvas.filter.antiAliasing = 2;

        }
    }
}