My friend's email account recently got hacked and emails were sent out to all of his contacts with malicious links. Himself and many others have confirmed that the link is some sort of Trojan horse. The links look like this: http ://t.co/9UHqh8PL. DO NOT OPEN! This hasn't affected my Macbook Air (Snow Leopard) in any way that I can notice. Just wondering if it might have been affected in some way that I'm unable to notice (something subtle). How do I rule this possibility out? Thanks.