Take a bit of precaution, OS X and Bluetooth users. It seems that a security vulnerability has been discovered in the form of an OS X trojan. The trojan, called Inqtana-A, isn't actually a danger in and of itself, and is merely a demonstration that propagates itself via a Bluetooth hole but will end its life on February 24th. However, the vulnerability is still there, and that means that malicious code writers are probably at work looking for ways to exploit it. A fully updated OS X install should be protected, another reminder of how important it is to keep your machine up to date with the latest security patches.