I was finally able to make use of IPv6 support on my systems around the time 4.1.9 was released and was really pleased to see WinSCP supported it. However as of 4.2.5, 4.2.6, and even the latest 4.2.7 release, it does not work at all. I simply get an error message upon attempting to connect to an IPv6 host via sftp or scp. The error message says: "gethostbyname: unknown error" and gives me the option to click ok, Reconnect (with an automatic 5 second count down timer), or help. If I install 4.1.9 it works again, so it appears to have something to do with the 4.2.x series only. The oldest 4.2.x series I could find to try was 4.2.5 and it doesn't work there, and the latest 4.2.7 doesn't work either. I was hoping this would get caught and fixed by now, but I guess IPv6 isn't yet that popular, so it probably doesn't get used/tested by many people at all. I would really appreciate a simple look into this, as it did previously work in the older 4.1.x series.