Blizzard is still getting caught with its pants down as swarms of players keep overloading Diablo 3 servers attempting to login. But while that in itself isn’t unheard of, if regrettable, the real problems players are facing is having their Hardcore characters permakilled by server issues while playing in Hardcore Mode. All in all, not a great time to be a Diablo 3 player.
“We’re currently working on a fix for this and are looking to have it implemented as soon as possible; we hope to have future patching processes smoothed out for Diablo 3,” according to Blizzard.
Source Diablo 3 Forums