In connection with the Security Advisory for Flash Player, Adobe has also released new versions of Adobe Reader for Mac OS X and Windows. (Reader contains an embedded version of Flash Player.) According to Adobe, Reader for UNIX/Linux systems is not affected, nor is the new Adobe Reader X for Windows. The new versions are 9.4.3 for Windows and Macintosh, for those users who currently have version 9.4.2, and version 10.0.2 for Mac users currently running Reader X, version 10.0.1. There are also corresponding new versions of the Acrobat product for Windows and Mac. More detail is available in the Security Bulletin [APSB 11-06].
Reader users on Mac or Windows systems can get the update by using the built-in update mechanism (Help / Check for Updates). Alternatively, updates for Reader and Acrobat can be downloaded from this page. Note that these are update packages, not full installation binaries; they assume that you have version 9.4.2 (for Windows), or either version 9.4.2 or 10.0.1 for Mac, already installed.
I recommend installing this update promptly.