https://sureai.net/forum/viewtopic.php?t=4103
I also encounter Bad Request error problem every time I hit Save for the first time, pretty annoying. And sometimes the page freezes and my edits just vanishes. Uh.
For deployment, IPv6 is largely incompatible with IPv4 at the packet level, and translation services have practical issues that make them controversial.[2] IPv6 and IPv4 are therefore treated as almost entirely separate networks with devices having two separate protocol stacks if access to both networks is needed, with tunneling of IPv6 on IPv4 and vice versa. In December 2008, despite marking its 10th anniversary as a Standards Track protocol, IPv6 was only in its infancy in terms of general worldwide deployment. A 2008 study[3] by Google Inc. indicated that penetration was still less than one percent of Internet-enabled hosts in any country. IPv6 has been implemented on all major operating systems in use in commercial, business, and home consumer environments.[4]