I figured out a workaround in the meantime. If you delete "~/.config/fontconfig/fonts.conf", close Firefox/Thunderbird, and reopen them - the original font is restored.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1196954 Title: Thunderbird and Firefox fonts messed up in Gnome after installing and using KDE4 once To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-kde4-meta/+bug/1196954/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs