Updates have been issued today, 08/06/2012, to Flash Player v11.3.300.257. You can either download them from Adobe or wait to see if Flash Player's built-in updater gets on with the job and does it for you. It's a security update, so you should get it as soon as possible one way or the other.
Download Flash Player 11.3.300.257
Security updates available for Adobe Flash Player
Remember to untick the installation of McAfee Security Scan Plus unless you actually want it!
There's also a note from Adobe:
Note: Beginning with 11.3, the universal 32-bit installer will include the 32-bit and 64-bit versions of the Flash Player.