Apple Safari 3.2.3 does not properly implement the file: protocol handler, which allows remote attackers to read arbitrary files or cause a denial of service (launch of multiple Windows Explorer instances) via vectors involving an unspecified HTML tag, possibly a related issue to CVE-2009-1703.
http://www.securityfocus.com/bid/35482
http://www.securityfocus.com/archive/1/504480/100/0/threaded