Apple Security Update 2010-004 / Mac OS X v10.6.4 Shipping with Outdated Version of Adobe Flash Player - Adobe Product Security Incident Response Team (PSIRT)
Earlier today, Apple released security update 2010-004 / Mac OS X v10.6.4. This update includes an earlier version of Adobe Flash Player (version 10.0.45.2) than available from Adobe.com. While the Mac OS X v10.6.4 update does not appear to downgrade users who have already upgraded to Adobe Flash Player 10.1, Adobe recommends users verify they are using the latest, most secure version of Flash Player (10.1.53.64) available for download from http://www.adobe.com/go/getflashplayer.
To verify the Adobe Flash Player version number installed on your system (after applying the Mac OS X security update), access the About Flash Player page, or right-click on content running in Flash Player and select "About Adobe Flash Player" from the menu. If you use multiple browsers, perform the check for each browser you have installed on your system.