I get a warning that fonts are missing when opening a quark document.
I get a warning that the fonts are missing hidden in the Export to PDF Options settings.
But, unless I go into the options and double-check every time Quark makes a pdf anyway. Because quark substitutes Courier for the missing font neither JAWS or Distiller complains that there is anything wrong.
... there was the puzzle of why the sun came out during the day, instead of at night when the light would come in useful.
Terry Pratchet