1. '|' and '&'
 According to POV-Help 6.5.4.4.1&2, the operator '|' means merge
 and '&' means intersection.
 But these operators don't work properly on beta 8.  
 For example, following isosurface is not the intersection 
 of two spheres.
   isosurface{
     function { f_sphere(x,y,z,1) & f_sphere(x+0.5,y,z,1)}
   }

 These were ok on beta 7.

2. 'int()'
 The function 'int()' does not work in isosurface.
 Try the following isosurface. 
   isosurface{
      function { int(0.5)}
      threshold 0.5
   }

 POV-Ray crashes on my PC.
 POV-Ray for Windows 3.5 beta 8, Windows Me, Celeron 600MHz

R. Suzuki

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