Well, how much do you love Perl? :)

3rd edition has a GREAT chapter on Object Oriented programming. It's a great starter chapter before you move on to TheDamian's Object Oriented Perl.

Also, I personally find that 3rd edition makes it easier to find things for reference, like standard functions and special variables.

Finally, you can learn how to play with threads... mmmmm.. yummy.. :)

Give your 2nd edition to a wanna-be Perl hacker. It'll get them started the right way. 3rd edition is well worth the 50 clams, and you may find it with a 30% off sticker at Borders real soon.

Updated: ACK! Damn coffee hasn't kicked in yet. I saw 3rd edition and my brain automatically assumed that you were talking about the camel book. I really wasn't a fan of Learning Perl. It was too basic, and the camel book really starts you off with a great overview. According to the preface, Camel 3 has made less assumptions about your programming experience -- so the overview is even better than before for newbies. Always go camel.