Adobe Acrobat PDF vulnerability

Don't know if anyone has seen this. We just received an email at work letting us know of the vulnerability:

Attacks using poisoned PDF files have leaped to the top of the threat list. Symantec reports that suspicious PDF files skyrocketed in 2009 to represent 49 percent of Web-based attacks that the company detected, up from only 11 percent in 2008. According to statistics from major security companies, PCWorld reports the next-most-common attack, involving an Internet Explorer flaw, was far behind at 18 percent.
According to security experts, changing a setting in the current version of Adobe Reader can help.

Acrobat Reader by default will open non-PDF file attachments. To prevent it:
- Open Acrobat
- Select Edit
- Preferences,
- Trust Manager
- and deselect Allow opening of non-PDF file attachments with external applications.