Font is rendering incorrectly
Apogee Preflight is capable of detecting font rendering issues. Process the PDF file through a separate Hotticket or Public Page Store, specially designed to check for font rendering issues.
The action you will need to use is ap_DetectFontRenderingIssues.
Note: This action is only available for Apogee Prepress 7.0 and higher.
If this Apogee Preflight Action is not available on your system click here to download the preflight resource.