I tried two---I got one from CPAN, and I'm not sure where the other one was from. I extracted it using Winzip (I've had problems trying to extract Perl modules using tar before, so this is the method I've been using for a while). It's odd because I use the exact same method when installing Perl modules and have never had this problem or anything similar.
I'll give tar another go and see if that solves it.

Update: Awesome---using tar to unzip and extract seems to have fixed it :) Thanks. V strange though.