Unexpected font substitution within EPS graphics

When you include an EPS image created from another application (for example, Adobe PageMaker, Illustrator, or QuarkXPress) Ghostscript may substitute fonts in the EPS graphic with another font such as Courier or Helvetica.

This can occur if the EPS image references a font that is not installed on your system. In general, you can avoid this problem by including all of the fonts required by the EPS image within the EPS file, or by converting the text in the EPS to outlines.