> Could the problem be name resolution? Check the /etc/hosts file on the > misbehaving machine to see if someone's (misguidedly) hardwired some bogus > IP addresses for their ISP in it.
That's an interesting new lead. I've thought all along it's something to do with name resolution, but I have no idea how that is handled in Macs.
I'll go over to their place tomorrow and see what it looks like.