Blur effect disappears when publishing for AIR 3.4 iOS

Hi, with Flash CS6 I create some movieclips twinning with Blur effect applied, then I compile for iOS. When I test it locally, no problem. When I test it on a device (iPad with iOS 5) the blur effect completely disappears.

The blur effect is applied directly on a movieclip, NOT with AS3 code (and I set the clip to be cached as bitmap, directly in the properties panel).

Any help is appreciated! :slight_smile: