I got an e-mail purporting to be from another catter, but when I tried to open it I was told I'd performed an illegal operation and the application was closing down. I updated my Norton and the scan proved clear. So I think my firewall saved me - also, I've got an old version of Outlook Express, and BadTransB apparently only affects the 5.01 and 5.5 versions. This particular virus has spread very quickly - helped by BTOpenline, who accidentally e-mailed it to all their customers. It's nasty, not just because you can activate it by previewing it, but also because it tracks keystrokes so can send PIN numbers etc back to the virus originator.