problem with 1.20.9 (and 1.20.10) on the iPad

Dear Klaus!

We ran into an interesting problem here. It seems that after updating to 1.20.9 or 1.20.10, and testing on the iPad, we're having an issue where krpano.image.sphere is evaluating to null on certain xmls. Here's an example xml file:

<krpano><image><sphere video_url.desktop="" video_url.mobile=""/></image></krpano>

and so while debugging, out of the three console logs below

console.log(krpano);
console.log(krpano.image);
console.log(krpano.image.sphere);

The first two return valid values, the last is null. I mean there are obviously a .desktop and a .mobile device-checked attributes in the xml, but this is just a custom attribute the sphere still shouldn't be null, also:

- it works with version 1.20.9 and 1.20.10 on the iPhone

- and works with the iPad too with krpano versions 1.20.7 and belowAny idea what might be causing this?