The Acrobat 9.1 updater is now available, and I would suggest that you grab it and install it if you haven’t already done so. Form the Acrobat team:
"Product updates for Adobe Reader and Acrobat 9 that patch the recent security vulnerability are immediately available for download. They are currently available for Windows and Macintosh and several language versions. This updates the products to version 9.1."
For more information and to download the updater, please read the tech note:
By Timothy Plumer, Jr.
March 12, 2009