Data::Alias was generally broken in 5.18.x (CPAN Testers Reports confirm this).
This seemed to affect quite a few people: there've been a number of posts about this.
Version 1.17 of Data::Alias appears to have fixed the problem; again, CPAN Testers Reports seem to confirm this.
An Englishman in New York
An American Werewolf in London
An American in Paris
The Innocents Abroad
An Idiot Abroad
Robinson Crusoe on Mars
A Connecticut_Yankee in King Arthur's Court
There and Back Again
Travels into Several Remote Nations of the World
Results (75 votes). Check out past polls.