Cool, very good photography.
On the idevices version the fullscreen doesn't work. You could replace it with a js function to set the window size fullscreen.
There probably should be a built in real html5 fullscreen function, or is there one in reality?
And your over lapping elements dont overlap
replacing id with one that you use.
You could also spruce it up to make it tween/transition.
Klaus! Why doesn't the switch(fullscreen) work do the same in JS?
Also noteworthy, it may be a good idea to run on a timer a similar function to reset your krpano div width and height cause the iphones/ipad accessibility zoom feature messes the orientation change all up.