Apple Mac users should be careful of potential attacks from a trojan horse which disguises itself as a Flash Player installer:

Flashback.G – New Mac Java Trojan in wild

QUOTE: A Mac Trojan named Flashback released last year masquerading as a Flash Player installer appears to back under a new variant. A new variant of the Flashback Java Trojan known as Flashback.G is circulating in the wild running on OS X 10.6 (Snow Leopard). According to Intego, if your system has been compromised, Safari and Skype maybe prone to frequent crashes and find a Java applet.  Additional information can be found at: