IMO

If you have to ask :) it isn't worth it :)

Don't worry about new syntax ... not that important, but bug fixes, esp regarding threads are

The other thing is increasingly improved unicode support

This brings you up to perl-5.14.4, or perl-5.16.3

If you're thinking you need some of the fancy new regex features, you don't, all you need is marpa scanless

Re: perldeltas - every perl*delta in one file (pod.lst) ( perldeltas.html#p5144-Security     perldeltas.html#p5163-Security )