Please describe the problem:
When loading 16 bit fits images from the Hubble telescope most of the
detail can be lost.  Most of the information for some of the images
is in a small portion of the range of 0 to 255 range, say 0 to 30.  
The fits loader cannot change to log mode or some other rescaling of 
the range to capture the detail.  This makes it impossible to use GIMP for creating RGB images from some Hubble data.

Steps to reproduce:
1. Download an image from one filter for the HST. For example, use the 
file 
http://www.spacetelescope.org/projects/fits_liberator/datasets/eagle/502nmos.zip.
 
from the ESA site.

2. Unzip the file and open it with GIMP.

3. Use layer> colors> levels or layer> colors> curves to try to adjust
the greyscale image to show most of the detail.


Actual results:
You get a greyscale image without enough detail.


Expected results:
One hopes to get a greyscale image similar to the thumbnail on the page

http://www.spacetelescope.org/projects/fits_liberator/eagledata.html

Does this happen every time?
Yes.

Other information:
The fits liberator plug-in for Photshop does this correctly for these images.

This may be considered more of a feature request rather than a bug, but loading
the Hubble images is iffy with the current fits loader.