As I remember it peeps using wireless in their LAN had to make sure IPv4 in their wireless drivers was deselected in order for it all to be stable.
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did you mean to put IPV6 ?
They would need IPV4 if they wanted to use the wireless, where as I know that having IPV6 as well as V4 selected causes strange issues, notably DNS problems.
(unless of course someone is running a V6 network at home)