iOS 6: problem with sprites rotation in gpu mode

Hi,

I have a game published on iTunes and today I found a serious problem with the latest iOS 6 GM.

Sprite rotation around X and Y axes doesn't work with gpu render mode.

Here is my code:

<mx:UIComponent id="gameCanvas" mouseChildren="false" mouseEnabled="false" width="100%" height="100%" />

...

var gridSprite:Sprite=new Sprite();

gameCanvas.addChildAt(gridSprite,0);

// then I draw stuff on this gridSprite

It works fine if this sprite is not rotated.

But when I change its rotationX or rotationY properties, the sprite disappears from the screen!

My game works fine on older versions of iOS (5.0, 5.1.1 and 6 beta 3).

This problem only happens on iOS 6 GM and since iOS 6 will be officially released in a few days, I am really worried...

I tried Air 3.3 and Air 3.4 - both have this problem.

In "cpu" and "direct" render modes sprite rotation works, but graphics performance is terrible. So "gpu" is my only option...

I'll really appreciate any help.