Is this a UIViewAnimationTransitionFlipFromRight bug?

I've got the following problem:

I've a nice working flip animation, but when I've rotate my device before animation:

1. The flip is going by the horizonta开发者_运维技巧l axis (rather than vertical as it should)
2. My controller.view (I use controller.view) has the previous orientation.

Where am I wrong?

thanks