Artifacts in Textfield with antialias for readability over iOS 5.0.1

I have an app in Adobe mobile AIR. Everything was ok until update to iOS 5.0.1.

Zoomed textField with antialias for readability behaves very strange when is dragged.

Please watch the movie: www.youtube.com/watch?v=0tdkNYT1x4A

And one more example: http://www.youtube.com/watch?v=xwdpDecN7i0&feature=youtu.be

When I set readability for animation every thing is ok, but then fonts are less readable.

I also tried:

- cache as bitmap

- dynamic text field

- render as html

- different fonts

- embed fonts

- disable kerning

- etc.

always the same, especialy when iPad is more busy (new elements show etc.)

I'm using Flash Builder 4.6 with 4.6.0 SDK

Now i made same project in AS3 without flex and seems to work 😕😕 So I think its flex fault 😕😕