The Adobe Reader 7.0.9 update fixes a number of security vulnerabilities. Adobe recommends that all Adobe Reader 7.0.x users apply this update.
Security Fixes in Reader 7.0.9
Details of these vulnerabilities are provided in this security bulletin located here - http://www.adobe.com/go/apsb07-01
Proceed to download
(Vista users may need to choose "XP SP2" to be offered Reader 7.0.9)