Well, I think I am getting close, things are working as expected on the PC and Mac now but when I compile to ipad, the aspect ratio is not correct, the 8x8 texture seem to have become squashed into 3.5x3.5 or similiar. And the other textures look like they have been automatically resized, it is as if the point set texture settings has just been ignored.
This is the Example 1 I compiled with using the default settings, ie "Top Left", "Top" etc 8 button example, but still things are not how I expected.