in reply to shared perlbrew running as root
Try running
env | grep PERL5LIB
both as userx and as root. I admit up front I don't know anything about perlbrew, but I agree it does sound like a library issue. If you get a certain value for PERL5LIB as userx and nothing as root, I'd try setting PERL5LIB for root to whatever it is you got as userx.
Or alternately, use a 'use lib' statement in scripts owned by root.
/G
In Section
Seekers of Perl Wisdom