Keychain Access in Mac OS X 10.4.2 and earlier keeps a password visible even if a keychain times out while the password is being viewed, which could allow attackers with physical access to obtain the password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44462
http://www.vupen.com/english/advisories/2005/2256
http://www.securityfocus.com/bid/15252
http://securitytracker.com/id?1015126
http://secunia.com/advisories/17368
http://lists.apple.com/archives/security-announce/2005/Oct/msg00000.html