A security update for Mac OS X 10.3.1 and 10.2.8 fixes a problem with the way cookies are accessed in the Safari browser. The new update allows only authorized Web sites to access user cookie information.
For more, go to:
Mac OS X 10.3.1: http://www.info.apple.com/kbnum/n120283
Mac OS X 10.2.8: http://www.info.apple.com/kbnum/n120282