I was wondering how safe those were. I had heard that previous versions were able to be hacked, but that they had updated the software to prevent it. Like you said, since this is computer-based, if you plug into an infected machine, you can still lose your funds.
I keep my anti-virus up to date, I don't go to random sites on the internet where you can pick up junk, and try to use common sense when I get suspicious-looking emails and such.