The following scene was rendered under linux and windows. The linux
version rendered a white table whereas it should be bumpy and blue.
Pov-Ray for windows (3.1e) rendered it correctly. I downloaded the
latest linux version, but the result was still the same. The images are
posted @ binareies.images. Here's the source:

camera {
    location  <0.0 , 2.0 ,-5.0>
    look_at   <0.0 , 0.0 , 0.0>
}

sphere {y, .5 pigment {colour x}}

light_source { <-2, 2, -2>*1000 colour 1}
light_source {<2, 5, 2>*1000 colour 1}

// the table
box { <-5, -1, -5 >*100 <5, 0, 5>*100
    pigment {colour rgb <.8,.8,1>}
    finish {
        diffuse .9
        reflection .2
        brilliance .4
        specular 1
        roughness 0.2
        ambient .05
    }
    normal {
        bump_map {
            gif "surface.gif"
            map_type 0
            interpolate 2
            bump_size 0.03
         }
         scale 2
         rotate 10*y
    }
}

// the room
box {<-1, -.02, -1> 1 
   texture {      
      pigment {
         bozo
         color_map {
            [ 0.0   rgb <0.16, 0.55, 0.27> ]
            [ 0.11  rgb <0.42, 0.58, 0.13> ]
            [ 0.27  rgb <0.016, 0.49, 0.38> ]
            [ 0.47  rgb <0.0,  0.50, 1.0>  ]
            [ 0.79  rgb <0.37, 0.48, 0.54> ]
            [ 1.0   rgb <0.46, 0.39, 0.14> ]
         }
         turbulence 0.075
         lambda 2.52
         scallop_wave
         translate 1.0 * x
      }      
      finish {
        ambient 0.2
        brilliance 0.526
        specular 1.0
        roughness 0.0001
      }
   }
   scale 5600
}

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