I have just become the latest victim of a Skype account hack (the usual thing - they change your password and email so you can't get back in, and then use up your SkypeOut credit), and I've lost about 10 euros of credit. What worries me more, though, is the fact that my account was hacked despite only being used on a Mac. Any ideas as to how this might have happened? I have the OS X firewall switched on, and have WPA2 security activated on my AirPort Express. I know that malware isn't usually a concern with Macs, but is it conceivable that I have something nasty running in the background? If I have, I have no idea where I might have got it from.