outputformat and default image format output

[Kralidis,Tom [Burlington]]

Hi,

In my mapfile, I've defined:

 OUTPUTFORMAT
  NAME GEOTIFF_RGB
  DRIVER "GDAL/GTiff"
  MIMETYPE "image/tiff"
  IMAGEMODE RGB
  EXTENSION "tif"
 END

...for some raster data, which is fine.  However, it seems to have taken
over my app/service as the default format.  i.e. if I request:

http://host/url?mode=legend&layers=roadlayer

..this gives me back a prompt to download a TIFF image.

If I comment out the OUTPUTFORMAT object, I get back a GIF image, which
is web friendly.

Any ideas on how to define OUTPUTFORMAT and making sure a web friendly
format is returned on requests?

Thanks

..Tom