I had several crash on iphone with the 1.8.15 version...
First I thought it was because it was using 1024px cube instead of 512px in the 1.8.14 version, so I made a 1.8.14 version to check and it incomparable !
With 1.8.14 it's very smooth and no crash, with 1.8.15 it doesn't moove well and crash sometimes my iphone 3GS...
Problem : I was using the bingmap.js plugin wich is not available on 1.8.14...
You can try both of the versions :
1.8.15 : http://www.360images.fr/step/mobile.html
1.8.14 : http://www.360images.fr/step2/mobile.html
Klaus PLEASE debug the 1.8.15 or make the bingmap.js plugin available for 1.8.14 !
THANX !