"those using Microsoft Windows are vulnerable"

from Hi-tech criminals target Twitter (from BBC News):

"Micro blogging site Twitter is the latest target of cyber criminals who are increasingly finding fertile ground on social networks[...]

It comes as Kaspersky also releases details about two worms that target social networking sites MySpace and Facebook. More variants of these worms are also starting to turn up. The worms transformed victims' machines into zombie computers, used by criminals to send spam, launch phishing attacks and harvest data[...]

Only those using Microsoft Windows are vulnerable to infection from these malicious programs."

Go go !

(That's the Apple symbol again, incidentally.)