Security Patch Issued for Blackberry

RIM (Research in Motion) has released a short term patch to fix critical flaws in Blackberry.

From CNet.com,

Multiple security vulnerabilities exist in the PDF distiller of some released versions of the BlackBerry Attachment Service. These vulnerabilities could enable a malicious individual to send an email message containing a specially crafted PDF file, which when opened for viewing on a Blackberry smartphone, could cause memory corruption and possibly lead to arbitrary code execution on the computer that hosts the BlackBerry Attachment service.

Beware and make sure that you don't download PDF files from untrusted sources on the Blackberry--in fact, wait until you get near a computer to do so. As CNet describes, this security fix will do little to help President-Elect in his quest to keep his Blackberry.

Do you think that this security fix will help? What permanent measures can be implemented to keep the Blackberry safe?