I haven't gotten up the nerve to get the real deal yet, but I remember in the Beta I had some issues with Perl that magically disappeared when I installed the Development Tools--have you done that? It might randomly solve your problems, too. :-)

And you'll need the development tools (gcc, make et al) if you want to build it from the source, which you can find right here (or more conventionally by poking around http://www.opensource.apple.com).

Good luck!

--Ben