Apple has delivered a Mac OS X security update to close a vulnerability revealed by researcher Charlie Miller at the recent Pwn2Own hacker contest in Vancouver, British Columbia. The update plugs a flaw that could be exploited to run malicious code if a user is tricked into into viewing or downloading a document that contains a specially crafted embedded font, according to an Apple advisory released Wednesday. The update is for Mac OS X 10.5.8 and 10.6.3. — DK