Facebook FQL API for Photos states the maximum resolution for a photo returned from the API is 960x960:
The Photo object has an equivalent src connection. Using photo_src FQL, you can retrieve images with the following dimensions: 960, 720, 480, 320, 180, 130, 75 pixels.
However, some images are uploaded at a higher resolution. Sometimes even much higher.
When browsing Facebook regularly, you can see these pictures and view their full size. However, I can't seem to find any way to get the original resolution in the API.
Is this possible and I have missed something? And if it's not - why?