I have my app ready and when I tested it on iPad running iOS 6.0.1 with orientation mode enabled, the resize doesn't work correctly.
If I start app in portrait mode, it's good but as soon as it goes to landscape, it doesn't resize for landscape and stays the viewport to the size of portrait. The same goes for the other side. If I start my app in Landscape, it's good but as soon as it goes to portrait, it doesn't resize and things go out of screen.
I'm using this viewport config.
<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />