Hardship to a specific upper-layer activity?

>Replace the 4 lines quoted above with (a spelling checked version of...)
>
>	IPv4 Link-Local address may continue to be used as a source address
>	in communications where switching to a preferred address would
>	cause communications failure because of the requirements of an
>	upper layer protocol (e.g., an existing TCP connection).
>	For more details, see Section 1.7.

Agreed. This more precisely captures the intended meaning. The previous 
wording came from Thomas Narten; unless he raises any objection to the 
revised text, I think we should take it.

I've provisionally updated <http://files.zeroconf.org/rfc3927new.txt> 
with your new text.

Stuart Cheshire <[email protected]>
 * Wizard Without Portfolio, Apple Computer, Inc.
 * www.stuartcheshire.org