True .. another thing is .. if you are talking to someone via dcc .. they change their nick to newnick .. it still appears as
<RoCk> so how are you
<oldnick> i'm pretty good
yadda yadda yadda .. you get the point
To just change any/all dcc windows named oldnick to newnick on cid just makes sense to me .. but only if mIRC sees the nick change .. just like with query windows .. if mIRC sees Brad change his nick to Brad-Away on scon 2 and there is an open query window on scon 2 named Brad ... it renames that query window to Brad-Away, if it doesn't see the nick change it does nothing as it doesn't even know it happened.
Just makes sense to me