http://bugs.winehq.org/show_bug.cgi?id=15485
--- Comment #12 from Vorobyov Anton phoenix@mail.ru 2008-09-30 15:04:41 --- As far as i understood from following post: http://myeve.eve-online.com/ingameboard.asp?a=topic&threadID=883386&...
It's some kind of asynchronous IO between network layer and application layer, so i really don't have any thoughts how it could affect game and expecially WM features like focus switching.
Long ago Stefan mentioned that wc3 and eve both need asynchronous IO (i have no clue between which components IO Completion operates): http://bugs.winehq.org/show_bug.cgi?id=9787#c190 However IIRC that issue didn't affect eve.