Wrong equirectangular panorama Why my panorama is wrong?

This is the cube with the camera inside.
Under the camera (and above too) 360 panorama is "shrunk":


This is the camera settings:


And this is the render result:


The scene looks like:


Blender file:



P.S. I used FSPViewer (FSoft) for view panorama render result.
Using your blend file (in blender 2.77a) the render was ok. Then using it as environment texture in world shader and viewport showed no pinching.

The problem seems to come from FSPViewer (sphere UV mapping).


EDIT:
Mapping an equirectangular texture on a UV sphere can't be done with UV unwrapping without pinching because of the tris at north and south poles. But you can use this setup: