I am using the demo version because we are on 2.1 right now and did not want to upgrade right away unless we were sure that we could guarantee that these fonts would work in 2.5. I have written a test program in VB to test this using the 2.5 demo version of the Amyuni PDF Creator. However, any text that was drawn using those fonts is not visible. With embedding turned on, the File > Document Properties dialog shows the OpenType font(s) as being embedded. I have tried both embedding and not embedding. When an OpenType font (at least the OpenType fonts that our customer is using) is used, the text as written to the PDF file using that font, does not display in the output PDF file. We do use font embedding in our application, but I have done some more investigation and this is what I know: The real problem might actually not be related to font embedding.
I have more information on the actual symptoms.