>> My Apache servers do not behave in that way...
>
> I bet they do.
I bet they don't. None of my servers require the second CRLF. Nor does
Google's. Nor does lug.org.uk's. Try a few...
>> Either something very odd is going on with this hardware, or $ISP is
>> lying
>> to me about which subscriber is attached to this IP address.
>
> Either one of those is plausible, although the latter is more
> likely, IMO.
It's a sad indictment of the quality we expect from ISPs, but that is what
I'm leaning towards as well :-(
Vic.