postscript fonts
 

I have a figure that I am exporting to EPS, to be used as a t-shirt design on spreadshirt.com. Their printing process requires that the design be entirely vector-based (rather than bitmap), including any text. So far the EPS files I have generated have apparently been no good. I'm guessing that if I can get OmniGraffle to use a postscript font when it exports, I'll likely be okay.

Does anyone have any experience with using postscript fonts with OmniGraffle, and in particular, with EPS export? How can I ensure that the export does the right thing?

Thanks for any help...