The exploit we’ve previously mentioned here only affects you if your setup matches the following:

Platform: Windows XP (Vista users are not affected) with Internet Explorer 7 installed

Affected Software Versions:

• Adobe Reader 8.1 and earlier versions
• Adobe Acrobat Standard, Professional and Elements 8.1 and earlier versions
• Adobe Acrobat 3D

Adobe has finally provided a workaround, though it’s not terribly straightforward if you’re uncomfortable mucking about in the registry:

http://www.adobe.com/support/security/advisories/apsa07-04.html

They plan to eventually provide a more user-friendly solution. Until then, the exploit–while not known to be out in the wild yet–has the potential to be extremely damaging; applying Adobe’s workaround is strongly recommended while we wait for them to provide a proper, more-polished patch.