Converting issues

When converting files through PDFCreator, all my I's and F's are replaced with question marks. Have tried extensive troubleshooting and installed older version of PDFCreator and still same results. How can I fix this?

Hi,
are you by chance using a custom font or one that requires licensing for embedding?
Is this for a specific type of file, or do you get this even when printing a simple test page from notepad?

Best regards,

Robin