Ok, here are some more benchmarks, compiled in a 32-bit Ubuntu 10 environment,
then run on 64-bit Debian 6.0 environment on the Athlon II x4. I went into all
of the Makefiles and edited out any references to any other -march and
-msse/-msse2 statements.

gcc 4.4.5, -march=i386 -ffast-math -funroll-loops
  Parse Time:    0 hours  0 minutes  1 seconds (1 seconds)
  Photon Time:   0 hours  0 minutes 24 seconds (24 seconds)
  Render Time:   0 hours 18 minutes 57 seconds (1137 seconds)
  Total Time:    0 hours 19 minutes 22 seconds (1162 seconds)

gcc 4.4.5, -march=i386
  Parse Time:    0 hours  0 minutes  1 seconds (1 seconds)
  Photon Time:   0 hours  0 minutes 26 seconds (26 seconds)
  Render Time:   0 hours 20 minutes 44 seconds (1244 seconds)
  Total Time:    0 hours 21 minutes 11 seconds (1271 seconds)

Povray official binary
  Parse Time:    0 hours  0 minutes  1 seconds (1 seconds)
  Photon Time:   0 hours  0 minutes 28 seconds (28 seconds)
  Render Time:   0 hours 23 minutes  3 seconds (1383 seconds)
  Total Time:    0 hours 23 minutes 32 seconds (1412 seconds)

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