The current version of Acrobat X (10.0.2) doesn't support IE9. It's possible that this is the issue. Here are the current system requirements: http://www.adobe.com/products/acrobatpro/tech-specs.php
Lori Kassuba is an AUC Expert and Community Manager for AcrobatUsers.com.
Issue When printing from Internet Explorer 9 (IE9) to the Adobe PDF Printer, the resulting PDF file may have missing or garbled text.
Solution Uncheck the option 'Rely on system fonts only; do not use document fonts' from the Adobe PDF Settings tab within the Adobe PDF printer preferences dialog box.
To access the Adobe PDF printer preferences dialog box, please perform the following steps:
Open the Printers and Faxes (Windows XP), Printers (Windows Vista) or Devices and Printers (Windows 7) folder. Right-click the Adobe PDF printer and choose 'Printing Preferences'. On the Adobe PDF Settings tab, uncheck to option 'Rely on system fonts only; do not use document fonts.' Click OK to close the printer preferences dialog box.
Lori Kassuba is an AUC Expert and Community Manager for AcrobatUsers.com.