Safari on Apple Mac OS X 10.4.6, when "Open `safe' files after downloading" is enabled, will automatically expand archives, which could allow remote attackers to overwrite arbitrary files via an archive that contains a symlink.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26427
http://www.vupen.com/english/advisories/2006/1779
http://www.us-cert.gov/cas/techalerts/TA06-132A.html
http://www.securityfocus.com/bid/17951
http://www.kb.cert.org/vuls/id/519473
http://securitytracker.com/id?1016069
http://secunia.com/advisories/20077
http://lists.apple.com/archives/security-announce/2006/May/msg00003.html