The current release of P::D requires Perl-5.10 via
"use" syntax in the modules and tests.

This module is intended for systems with a working
fork. If your system's fork is broken then it will
not work, or -- worse yet -- work sporadically. 
Adjusting the parameters in the expensive tests
(see next paragraph) will help determine just how
much abuse your system can handle.

A number of items in t/*t are intended to stress-
test the module. They stress-test your system at
the same time: creating over 100_000 status files
or forking hundreds of jobs in a short period.
All of the really dangerous tests will short-circut
unless EXPENSIVE_TESTS is set in the environment --
for example "EXPENSIVE_TESTS=1 prove --blib t/*t"
will run everything.