I think, as crazyinsomniac pointed out to me in privmsg, that while the POD and what I have here as a tutorial and some other sources all use $return, this tutorial at perl.com uses the return() form, which for their case, works, but doesn't work in the general case. Given that I bet a lot of people were introduced to this module via perl.com, I suspect this is where you are seeing this error pop up. CI says he was going to fire a message off to the author, Jeffory Goff, and see if he can't get it updated.

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important