A number of times over the years, there's been discussion about Storable as a vector for attack. If a user can feed you Storable data that you didn't expect, he has a good chance of doing nasty things to your program. This has been discussed on p5p and at YAPCs, but sadly never made it into the documentation. This has been fixed with http://perl5.git.perl.org/perl.git/commit/664f237a84176c09b20b62dbfe64dd736a7ce05e A release to CPAN containing this warning will also be made soon. Thanks to Brian Carlson of cPanel who brought this to our attention. -- rjbs