On Saturday 21 April 2012 13:47:57 Martin Gr��lin wrote: > > > systemsettings -> Application Appearance -> Style -> Widget style: > > > Plastique > > > > I have set plastik in kcontrol-appearnce-style, which is obviously ignored > > by kwin. > that's why I wrote "systemsettings". Obviously KWin is a Qt 4 application and > needs to have a configured Qt4 style and not a Qt3 style. qtconfig also does not affect Kwin4. To change its settings one have to install KDE4 desktop.