I don't have ipv6 connectivity myself, made some tests with westor who does.. I was just trying to document how ipv6 works in mIRC.
Looks like I gave argv0's speech more credits than Wiz's one, not sure why, on his last post argv0 claims that with /server -6 there's no fallback to ipv4, specifically that /dns -4 won't work. That statement seems to be incorrect and I take it /dns -4 does work with /server -6 (confirmed by westor).
My goal is also to document how scripts should handle these situations, many scripts use /sockopen without any of the -46 switch, I myself have such script and they failed recently on a server -6 connection.
So if I get this right:
1) on a /server -4 connection, ipv6 is disabled 'by default', but you can force it with /dns -6 and /sockopen -6
2) As a scripter, let's say I'm /sockopen'ing to somehost.com and suppose I'm aware that it can resolve to both type of ip addresses v4/v6, and that I want /sockopen to be able to connect to any of the type regardless of the ipv4/6 setting, I should be using /sockopen -64, correct?
