http://secunia.com/advisories/23138/
http://www.us-cert.gov/current/current_activity.html#adacrxvl
http://www.adobe.com/support/security/advisories/apsa06-02.html
http://www.incidents.org/diary.php?storyid=1898

QUOTE: Some bugs have been discovered in Adobe Reader and Adobe Acrobat, which may cause an included ActiveX control to crash.

The bugs are confirmed in Adobe Reader 7.0.5 and 7.0.8 for Windows. They have also been reported in Adobe Reader 7.0.0 through 7.0.8 and Adobe Acrobat Standard and Professional 7.0.0 through 7.0.8 on the Windows platform. Prior versions may also be affected.

The vendor is currently working on an update for version 7.0.8 for Adobe Reader and Adobe Acrobat.

Solution: The vendor recommends deleting AcroPDF.dll (this workaround will prevent PDF documents from opening in Internet Explorer).