Sorry for the few days delay in response, but in case someone else comes across this thread and a similar problem, I rewrote my script to simply do a `ssh ...` instead of Net::SSH::Perl and this worked fine when running under Parallel::ForkManager. I can now perform multiple simaltaneous ssh requests against a given host.

It's also far quicker (a matter of a second to execute versus 30+ seconds for Net::SSH::Perl).

Perhaps not as smooth as using the complete perl solution, but it works.

cheers,
Anth