And another issue fix (guess how long this took to figure out <g>)
Fonts installed in the Font Installer using KDE Control Centre (when run in Administrative Mode or as root) do not appear in applications.
Incorrect paths in /etc/fonts/fonts.conf.
KDECC updates the paths in /etc/X11/fs/config, not /etc/fonts/fonts.conf.
Edit /etc/fonts/fonts.conf in a text editor.
Locate the following line:
<!-- Font directory list -->
Insert the following line below it: