What application are you using to view the PDF?
Did you export to PDF, or save to PDF from the print dialog or Print to PDF using the AdobePDF virtual printer? What settings did you use?
What version of ID and waht OS?
Exported to PDF viewed in preview.Working on ID6 & OS X... I originally made the file in illustrator created outlines of the font copy & pasted to ID.
Preview is not a reliable viewer for PDF. Check it in Reader or Acrobat Pro.
Try export via the PDF/X-4 preset