Translations:Workspace Configuration/Desktop Configuration/12/en

From KDE UserBase Wiki

Solution You may have a leftover .kde folder from KDE3 in your home directory, and Qt looks at it first instead of the .kde4 settings folder. You can either rename or remove the .kde/share/config/kdeglobals file, which will cause Qt to use the .kde4/share/config/kdeglobals file instead. The next time a KDE3 application is started, it will regenerate the .kde/share/config/kdeglobals file, and will use the default KDE3 theme and colors, but will not affect the Qt applications colors.