http://forums.ubi.com/showthread.php/1457008-Server-Maintenance-June-2nd
原文：
UPDATE: Prior to deployment, it has been found that the patch was
unsuccessful and has been delayed. As such, today's maintenance will finish
early (approximately 12pm CEST).
This also means that the deployment of the Clear Sky Challenge Mode has been
delayed for the time being as well.
We will share more info on when the patch will be deployed and what it
contains as soon as we can. Thank you for your patience.
大意：
今天更新失败，维修时间提早结束，净空天际挑战模式没上线
心得：
真的会笑死，活了25年第一次看过网络游戏维修/更新会失败的
UBI真是处处有惊奇......