Update on Tyrannis 1.1 Optional Patch #5 (http://www.eveonline.com/news.asp?a=single&nid=4170&tid=1)
21 October 2010, 11:55 am
Due to an issue with EVE Mail formatting, we are disabling Tyrannis 1.1 optional patch #5 and restoring Tyrannis 1.1 optional patch #4. The EVE Online client will automatically remove optional patch #5 once it has been disabled and you have restarted the client.
Source: eveonline.com | news from EVE (http://www.eveonline.com/)