The crackle pattern appears to have changed in 3.7.  I haven't found this
documented anywhere.  I ran the following code using different versions and
version settings.  I will post the output in p.b.i.

global_settings { assumed_gamma 1 }

light_source { <-1, 1, -1> * 1000, rgb 1.5 }

plane
{  -z, -5
   pigment { rgb 1 }
   normal { crackle 2 }
}

Incidentally, this test scene ran much faster in 3.7RC3 than in 3.6.2.

OS: Windows 7 Ultimate
Word: 32 bits
Cores: 1, to the best of my knowledge

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