EVE Online Tyrannis 1.1 deployment update (http://www.eveonline.com/news.asp?a=single&nid=4133&tid=1)
30 September 2010, 2:38 pm
During the final stages of deployment for EVE Online Tyrannis 1.1 we discovered a critical issue with the client. We are currently working to resolve the issue and expect Tranquility to return to service at 17:30 UTC.
Source: eveonline.com | news from EVE (http://www.eveonline.com/)