Norton, apparently, is giving free upgrades to users of Norton Internet Security 2006, Norton AntiVirus 2006, Norton System Works 2006, or Norton System Works Premier 2006 with a current subscription. They are eligible to download and use the latest prod' versions (2007 - which has no script errors) for your Norton product as they become available during your subscription period.
Symantecs website:
http://www.symantec.com/home_homeoffice/support/special/upgrade2007/index.jsp
See 'What am I eligible for?'
Also, the 2007 version of Internet Security doesn't automatically come with Norton AntiSpam, Ad Blocking, Norton Parental Control or Confidential Information Blocking (which all came with 2006 version of NIS)
BUT there is a free add-on download from Norton that adds all of these features for this version once you upgrade to 2007, here:
http://service1.symantec.com/SUPPORT/custserv.nsf/docid/2006092616462646
