Bug Fixes in KDE Base
Change the "Use antialiasing" checkbox to tristate, defaulting to nochange that doesn't write out any fontconfig changes. Some distros have rather complex setup for fonts and changing anything in the fonts module overrode those settings. Since the default doesn't write out any changes, already made user changes are also preserved.
BTW, Helio, you have not forwardported any of those "Setting module to use system defaults" commits, have you?