Missing Characters in Frame Generated PDFs

I had an odd thing happen, that I thought I'd pass on. I was working on
my Mac to generate some statistical output. I printed out the results to
pdf, imported the results in to a Frame 8 document as a referenced
graphic. I then saved as a PDF with all fonts embedded. When viewing the
resulting pdf, two of the statistical charts had missing characters.
They just were not there. The two pdfs had been generated (accidentally)
using the smallest pdf file setting in Distiller 9. The other
problem-free charts had with all the fonts embedded made it through the
workflow perfectly. Regenerating the charts as pdfs with all fonts
embedded cured the problem with the final pdf.

Who would have thought that pdfs with non-embedded fonts would have
caused a problem down the line?

...Mike