Yes - see e.g. TVMiniGuide.xml:
<font3>font13B</font3>
This is a font defined in PM3's font.xml but BlueTwo's font.xml does not contain a definition for that. Either remove those font "overrides" (references.xml is used then) or add e.g. "font13B"'s declaration into the fonts.xml you use (of BlueTwo).
<font3>font13B</font3>
This is a font defined in PM3's font.xml but BlueTwo's font.xml does not contain a definition for that. Either remove those font "overrides" (references.xml is used then) or add e.g. "font13B"'s declaration into the fonts.xml you use (of BlueTwo).