Yes I think they have an infection.
Symantec says it is this
http://securityresponse.symantec.com...
Thanks Casey. I notice it's still there today - don't those guys check their site? I'm also surprised that the message comes up in Safari but not Firefox. I'm in the Firefox beta group, so you'd think they'd be on top of that stuff. Oh well. No indication on Symantec that it even affects OSX, but the message is awfully annoying. Even when you choose to ignore it, it keeps coming up. Lets see how long it takes them to get it sorted out. Meantime, I guess I'll browse FSN using Firefox.
ebear