iPad1-IOS 5.1 with 1400pixels Cubefaces

The update to IOS 5 has improved the iPad 1 quite a lot regarding crashes.

What I wanted to test was if I could use larger than 1068 cubefaces also.
I have a page here with 3 panos at 1400x1400 tablet cubefaces and using multiresolution 700 pixels tiles with max 1400 pixels for desktop. Maxpixelzoom 1.0

http://qtvr.dk/test-1400/

This works fine no crashes on my iPad1 with IOS 5.1 but when comparing the resolution by taking screenshots it turns out that it is downsampled to around 1068 on the iPad.

And whats worse if I use my standard setup with no tablet images and make them 700 pixel tiles multiresolution, the iPad just loads the 700 pixels version.
http://qtvr.dk/test-700/

Question is what happens on the iPad2 and on iPad 3 when it arrives.
As far as I know the Safari browser is exactly the same for iPad1 and 2 when using the same OS.

Hans

Here is a test adding the <display html5rendermode="2" /> to the 1400 pixels page.
http://qtvr.dk/test-1400/index2.html

It helped. Now quality is the same on Ipad and desktop. And no crashes.

But why is the multi resolution not loading level 2.

Hans

I have been doing some more tests to see if there is a limit for the use of tiled cubefaces.
It shows that the max size is just 540 pixels which gives you 1080 pixels cubefaces on iPad.

If you use 560 pixels the iPad just loads the first level.

So even if it now with IOS 5 has no problem using 1400 pixels tablet cubefaces it only loads max 1080 using multilevel.

Please Klaus can you give me an explanation. Is it KRpano that make it do this or is there some sort of restriction in Safari.

Hans