A new version of Flash Player plug-in is available today (June 21st). The latest version is 11.3.300.262.
Go to http://get.adobe.com/flashplayer/ to get the latest version.
This version is for Mozilla Firefox and Safari.
If you have any issues with Flash Player 11.3 on Mozilla Firefox, see Issues | Flash Player 11.3 | Mozilla Firefox.
If you have issues with installing Flash Player, please post the issue @ http://forums.adobe.com/community/flashplayer/installing_flashplayer.