Seed 604, 400 ticks, snapshot every 100:
IBM XL C 5.0.2, AIX GCC 2.95.3, and Linux cc output directories matched byte for byte with diff -r.
Native XL/GCC comparisons were also repeated successfully.
Final population 3982; births 9021; deaths 5199; mutations 4055.

Full native XL run: seed 604, 4000 ticks, snapshot every 40.
Final population 6139; births 32160; deaths 26181; mutations 14580.
time: real 1m19.55s, user 1m10.83s, sys 0m1.06s.