Solve embedded fonts issues when submitting papers (i.e. Paperplaza)
The idea is to run your pdf graphics through ghostscripts' pdfwrite device to get the fonts embedded (whatever that means):
$ ps2pdf13 -dPDFSETTINGS=/prepress foo.pdf bar.pdf
or
$ ps2pdf -dEmbedAllFonts=true foo.pdf bar.pdf
To check which fonts are embedded:
$ pdffonts foo.pdf