DNS TTL not honoured

A MOO I run changed IP's today.
I had set the TTL on the DNS record to 1 minute in preparation for this. After the change I tried to reconnect, but couldn't. The popup warning I got still contained the old IP.
I pinged the IP and the host and everything looked fine. I then ran ipconfig /flushdns, repinged and everything looked good.
I then tried MUSHclient again but still no change. It wasn't untill I restarted the world that MUSHclient would finally connect.

MUSHclient shouldn't have to worry about DNS TTLs; that's Winsock's job. What might be happening is that MUSHclient looks up the domain name once, and then stores the IP address and uses that from then on; sounds like in order to fix this problem, it would suffice to always look up the host's IP address on connection.

It could also be a Winsock issue where its internal state needs to be flushed or something like that, and closing/restarting the world in MUSHclient does something to Winsock that causes it to flush its caches.

As the General\Info page of the world properties dialog contains the IP address, I'd guess MUSHClient stores the resolved IP in memory somewhere too, yeah :)

See:

http://www.gammon.com.au/scripts/doc.php?function=ResetIP