iPhone: UINavigationBar with buttons - adjust the height

Answer 1

Create alternate images, and in the view controller methods that handle animating the rotation, change the images in the bar button items. Or you could probably use a UIImageView as a custom view in your item, and set its content mode to scale the image down.

Answer 2

I figured it out: The height of the navigation bar must be 32 px! With 33 or 34 px the alignment screws up.