WCS and 32-bit FLOAT GeoTIFFS

[John Cartwright]

Hello All,

I've got a 32-bit float geotiff that I'm serving via WCS.  Strangely, 
GetCoverage requests are returning geotiffs comprised entirely of no 
data values.

Here's my OUTPUTFORMAT section in the mapfile:
OUTPUTFORMAT
  NAME GTiff
  DRIVER "GDAL/GTiff"
  MIMETYPE "image/tiff"
  IMAGEMODE FLOAT32
  EXTENSION "tif"
END

and I'm specifying "format=gtiff" in the request.

Can someone help me with what I'm doing wrong?

Thanks!

-- john