8/9     Sometimes when I use "ssh -l <username> <hostname>" for the first
        time it asks me if I want to add that host, I say "yes" and every-
        thing's fine.  Other times, it refuses to allow me to connect.
        I get simply, "Permission denied." in response.  Any idea why?
         \_ this might happen if the username doesn't exist on that system.
         \_ might not have permission to write to the key chain (like
            on an NT system where Fsecure uses a single global one.