Adobe PDF files have a lot of compatibility issues with print drivers.  More settings than can be managed by a print server.  Here are some things you can try:

1. Printer Properties - "Print as Image", "Print Image" in the advanced tab.

2. Printer Properties - disabled the 'PostScript Pass through' in the advanced tab.

3. Install a PCL printer driver:

Start | Devices and Printers

Add a Printer

Add a Local Printer

Create a new port:

Standard TCP/IP Port, Next

Hostname or IP address:, Next

Have Disk, browse to: \\ace-filesrv01\Software\Drivers\KonicaPCL\BHC652PCL6Winx64_3600EN , Ok, Next

Name the new 'Printer' anything you like, maybe "Konica PCL for Adobe", do not share it,  Next,  Finish.

4. The above items should solve the problem.  If they still are not working, send an eamil to the HelpDesk to install and uninstall Adobe Acrobat 11, which will help for some of those hard to print documents.