Hi,
First try this. Check settings for view mode of panorama:
<scene name=".....>
<view hlookat="xxx" .....
maxpixelzoom="2.0" ..... />
This means that allowed zooming in x 2 times more than the original image!(after droplet(normal...) resizing of sides of cube (default 2048 for desktop!))
Replace to:
megapixel zoom="1.0" , and its work without scaling out range of size//