Here are the changes between public POV-Ray 3.01 and 3.02.

 Note: This is an extremly minor upgrade which fixes a few fatal
 errors.  If you have not experienced any hard crashes in POV-Ray 3.01
 then you need not obtain 3.02.  The bugs are...

 1) Fixed illegal number of intersections bug.

 2) Fixed queue overflow bug

 3) Fixed problem with Ray->Containing_Index out of bounds.

 4) Fixed problem with undeclared identifiers in color_map.

 5) Fixed problem with Mac ttf crash.

 6) Put in trap for undiagnosed error in polysolv.c numchanges routine.


 Here are the changes between public POV-Ray 3.00 and 3.01.

 1) Fixed problem with some dda errors in height fields

 2) Fixed error line number bug.  Comments with // got double counted.

 3) Fixed problems with file input from stdin and file output to stdout.

 4) Fixed problem with PNG image maps.

 5) Fixed problem with illegal keywords in a # directive

 6) Fixed problem with smooth triangles that only bend in one direction.

 7) Fixed some blob bugs

 8) Fixed some lathe bugs; Modified lathe intersection code (much faster
    now); Modified sor intersection code (much faster if sturm is used)
    Fixed another bug in POLYSOLV.C

 9) Fixed problem with backslash in string literals

10) Added experimental feature warning to halo, atmosphere, and radiosity.

11) Fixed problem which split a file if you changed directory while
    rendering.

12) Fixed 'declare' with no '#' bug and added warning

13) Eliminated unnecessary light buffer on shadowless light source

14) Fixed TTF Normal bug
    Applied patches to TTF code to fix visible tearing
    Also added a check to allow Mac TT fonts to be used 

15) Fixed empty texture bug

16) Fixed problems with deeply nested #while, #if, #switch etc.

MSDOS:Fixed true color Diamond 24X
      Fixed djgpp make file
      Fixed problems with +FS output creating corrupt targas.

XWINDOWS: Changed colormap handling to dynamically allocate colors.

Linux SVGA: Added grayscale palette for preview, fixed video mode
      selection.

UNIX: Fixed up prototypes and variable types to remove many compiler
      warnings.
      Fixed problem with interrupt handler when writing to a broken pipe.
      Fixed problem with dithering code for mosaic preview.