The AoC servers will be down for a short time today to correct an issue that arose in yesterday's patch. The error caused socketed items to make their sockets disappear - though we're assured any gems are still there. The expected downtime is 5 hours, but will probably be shorter.
The offending bug causes certain socketed items to lose their sockets -- we are assured, however, that any socketed gems are still intact, and will reappear when the problem is fixed. The blanket figure of "5 hours" has been given for the downtime, which will commence at 7AM EDT on US servers, but community manager Famine has stated that it will likely be closer to 1 or 2 hours. The patch has already been deployed to the European servers, and their downtime was roughly 3 and a half hours going by this thread.