If you look at the site I am adapting for iPad at http://www.harrcreative.com/realestate/109 and tap the fullscreen button (actually tap just above the fullscreen button, there is a problem with the button that I am researching) on the bottom right of the pano, you will see that it does not actually go completely full-screen on the iPad, but only fills the center of the page.
This seems to be because full-screen simply sets absolute positioning on the pano div at position (0,0) relative to it's containing block. Unfortunately, my page layout establishes the entire tour in a div with relative positioning, making that div the containing block for the pano div instead of the making the page body the containing block.
Klaus, is it possible to use fixed positioning for full-screen mode, or could you temporarily move the pano div in the DOM so that it is a direct descendant of the body element? I think this would allow the use of relatively positioned ancestors of the pano div.