Trouble with ctrans sun raster output x86_64

I'm seeing a problem where "ctrans -d sun -record 1 gmeta" produces a
bogus raster output file on Linux x86_64. On i686 I get:

gmeta.ras: Sun raster image data, 512 x 512, 8-bit, RGB colormap

On x86_64 I get:

gmeta.ras: Sun raster image data 512, old format,

for "file gmeta.ras".

Any suggestions as to where to start debugging? I'm guessing wherever
the image header is generated and written.

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  orion_at_cora.nwra.com
Boulder, CO 80301              http://www.cora.nwra.com
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