Apple’s new version of Mac OS has some new and exciting features, and for Mac fans is a bargain at only $30. It is not, however, worth three times that. Or even $4,000. That’s what some customers have paid, without exactly meaning to. More than one person has come forward complaining that their PayPal accounts, linked to their iTunes accounts, are getting charged for their purchase of OS 10.7 Lion over. And over. And over.