I wonder what it was that Sophos actually found.
We're there any other details that Sophos passed along to you!?
I suspect that Sophos found a Windows nasty that will not run on your Mac.
Has your Mac been running correctly since then?
I received an email from an unknown sender. Sophos found a virus and dealt with it before I got to the email in question. When I tried to delete it, it started "loading" and the above message came up in a dialogue box. I am using Snow Leopard. Anyone have a fix?