Thanks. The article was very interesting, and produced a very useful piece of information.

E:\perl5.8.1\bin>.\perl -MPOSIX=RAND_MAX -e"print RAND_MAX"

32767
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So, as of perl 5.8.1, rand is limited to 15-bits! S'funny how long you can go with discovering, reading about or falling foul of these things. Anyway. I have now added

use Math::Random::MT qw[ srand rand ];
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to my .pl template file.

This uses The Mersenne Twister PRNG, rather than a Linear Congruential one, and is good for producing the full range of 32-bit unsigned integers.

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Examine what is said, not who speaks.

"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Hooray!
Wanted!