Gimp non-free - gif doesn't work

["Oliver Elphick" <olly@lfix.co.uk>]

I am trying to save a Gimp image as a GIF.  I have gimp-nonfree installed
and there is a gif executable in /usr/lib/gimp/0.99/plug-ins.

But, GIF is greyed out in the list of image formats when I do `Save as'.
If I save a file named xxx.gif, I get a GIF dialog box, but then the save 
fails.

How can I get this to work?

Versions: 
hi  gimp            0.99.18-2      The layers-based, non-Motif GNU Image Manipu
hi  gimp-data-extra 0.99a-1        An extra set of brushes, palettes, and gradi
hi  gimp-data-min   0.99b-1        A small set of brushes, palettes, and gradie
hi  gimp-nonfree    0.99.18-2      GIF and TIFF support for the GNU Image Manip
hi  libgimp1        0.99.18-2      Libraries necessary to run the GIMP

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver

PGP key from public servers; key ID 32B8FAA1



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