http://bugs.winehq.org/show_bug.cgi?id=35071
--- Comment #1 from Rafa³ Mi³ecki zajec5@gmail.com 2013-12-07 07:48:48 CST --- I've managed to find 3 possible workarounds for this issue!
1) Disable "Allow the window manager to decorate the windows" 2) Disable "Allow the window manager to control the windows" 3) In UOSteam change Options → Title Bar → Custom title bar mode → Disabled
It seems that the crash happens when UOStream tries to modify KDE's title bar!