For those of you who have been trolling our DNS details, you know that www.postgresql.org has been available over IPV6 for a while - just not activated in DNS. As of 15 minutes ago or so, we have now activated IPV6 for the main DNS record www.postgresql.org. Just like the IPV4 version, we are distributing the load across multiple frontends, with DNS based failover in case one of them were to go down. Right now, we have two IPV6 capable frontends and three IPV4 capable ones (the difference comes from our infrastructure in Europe being 100%25 IPV6 enabled, and our infrastructure in the US being 0%25 IPV6 enabled due to lack of upstream availability).
So if you are experiencing connectivity issues that started recently, check your IP stack if you are perhaps trying to connect over a broken IPV6 connection. If you need assistance beyond that, you can usually find helpful people in #postgresql on FreeNode who can help you figure out if the problem is on your end or ours!
Hopefully, this should be a completely invisible event to all our visitors....