Major vulnerability in Adobe Flash Player. Upgrade to beta now

From Adobe

A critical vulnerability exists in Adobe Flash Player and earlier versions for Windows, Macintosh, Linux and Solaris operating systems, and the authplay.dll component that ships with Adobe Reader and Acrobat 9.x for Windows, Macintosh and UNIX operating systems. This vulnerability could cause a crash and potentially allow an attacker to take control of the affected system. There are reports that this vulnerability is being actively exploited in the wild against both Adobe Flash Player, and Adobe Reader and Acrobat.

They advise to either delete/rename authplay.dll (but hold onto it, you might need it later, and your Adobe may crash when you use it) or, as I did, upgrade to Flash Player 10.1 Release Candidate, as it does not appear to be vulnerable.