Client performance degradation since Crucible 1.5 (http://community.eveonline.com/news.asp?a=single&nid=4950&tid=1)
21 March 2012, 3:01 pm
We have been receiving reports from players of client degradation and loss of frame rate following the release of EVE Online: Crucible. We are working on resolving this issue and the current workaround is to drop your anti-aliasing settings. In the meantime we would ask that you submit a bug report (https://bugs.eveonline.com/newbugreport.asp) with the title ‘Performance issues for CCP Vertex'.
Source: eveonline.com | news from EVE (http://www.eveonline.com/)