perlbrew 0.41 contain minor fixes:
The sub-shell is a fallback when user does not sourcing the perlbrew bashrc in
their ~/.bash_profile
or ~/.zshenv
. However it is advertised to avoid using
sub-shell, but just include bash/zsh integration for much better experience.
Also notice that, on Mac OSX Lion, zsh sub-shell is not working at all due to
the content of /etc/zshenv
.