I believe I'm facing same issues. Please see https://bugs.kde.org/show_bug.cgi?id=378227. I'm using Kubuntu 16.10.
** Bug watch added: KDE Bug Tracking System #378227 https://bugs.kde.org/show_bug.cgi?id=378227 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1614870 Title: Problems with font cache after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1614870/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs