http://bugs.winehq.org/show_bug.cgi?id=30981
--- Comment #9 from vanista@gmail.com 2013-11-03 17:52:21 CST --- I'm running KDE so I don't use IBus by default. However I just tried turning off the auto repeat and bingo! No more sticky keys, and as bonus the caps lock run toggle works at last!
Thanks for the info, this is a totally viable solution for me, I'll figure a way to quickly switch this config, possibly toggling it when launching the game.