G'day mlamborn,

Welcome to the monastery.

Firstly, it's not a good idea to alter the system Perl. Responses to Are there any major Perl issues with Mac OS X Lion? discuss this in more detail and offer some options. I chose perlbrew.

I'm running Mac OS X 10.7.5 (same as you) and Xcode 4.2 (earlier version than your 4.3.2). I don't have the same Perl version as you but I did successfully install WWW::Curl (v4.15) under perl v5.14.2.

Looking at CPAN Testers Reports and CPAN Testers PASS Matrix, I see this module has been successfully installed on Mac OS X under perl v5.12.3 on a number of occasions.

Modules which fail the 'test' phase will often install quite happily when forced. In these circumstances, I would recommend further checking before using the module in 'production'; this may involve: checking the test scripts (t/*.t); checking that code using an earlier version still works; carrying out your own testing specific to the intended usage of the module; and so on.