BitmapImage scale9Grid + smooth

Steps to reproduce:
1. Embed a bitmap asset
2. Create a BitmapImage mxml tag, set smooth="true"
3. Create a Sprite
4. Create a Bitmap
5. Instantiate the bitmap asset onto the newly created Bitmap's bitmapData property
6. Add the Bitmap as a child of the sprite
7. Set a scale9Grid on the sprite
8. Set the sprite as source of the BitmapImage
9. Set the width of the BitmapImage to more than 100% of the embedded image (so it scales)

Actual Results:
Scale9Grid is applied because of the DisplayObject (Sprite), but smoothing is ignored.

Expected Results:
Should scale and remain smooth after

Workaround (if any):
Patching this file
http://opensource.adobe.com/svn/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/primitives/BitmapImage.as

using this patch (see updateDisplayList):
1225c1225
< g.beginBitmapFill(_bitmapData, matrix);
—
> g.beginBitmapFill(_bitmapData, matrix, repeatBitmap, _smooth);