I'm having the same problem. Fonts get corrected if I run gnome-control- center and open font settings, but I wouldn't like to run gnome-control- center every time I restart KDE.
-- Ugly fonts in gtk apps under edgy KDE (kubuntu) https://launchpad.net/bugs/65820 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs