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：
今天更新失敗，維修時間提早結束，淨空天際挑戰模式沒上線
心得：
真的會笑死，活了25年第一次看過網路遊戲維修/更新會失敗的
UBI真是處處有驚奇......