Printing PDF attachments prints graphics and outlines but not text

When printing PDF attachments directly from the attachment list only the outline and graphics print.  Open an email message containing an attached PDF file, right click on the attachment at the bottom of the email and select print.  The print job will only have the outline and some graphics from the PDF document but not the text.  If the attachment is viewed by GW's document viewer in the body of the message and print is selected from the message body it prints OK.  PDFs also print OK when double clicking on the attachment then printing from Adobe Reader.

We are printing to network attached printers on a Microsoft AD network. I can replicate the problem on my computer. I have tried printing to an HP printer and a Konica printer and get the same results. I can print the PDF from Adobe or by opening the PDF in GW's viewer and printing.