Last night a routine maintenance of the Swedish top-level .se domain went seriously awry, creating an error that made DNS lookups for all .se domain names start failing. The net result was that Internet access in Sweden effectively ground to a halt for more than an hour and a half. The entire problem began when an incorrectly configured script forget to add the needed terminating “.” to the DNS records in the .se zone. Given the whole DNS lookup chain broke down from the DNS mistake, there’s still a number of users offline.