Macromedia has just released an update to the Flash Player which fixes a security flaw that was discovered in connection with the local shared object. This is solved by storing persistent shared objects in unpredictable locations - I'd say this is important to know for people who are directly accessing the SO files with 3rd party software from outside for example in standalone apps.
But actually that is not the only fix in this version - there are many more:
The infamous String.split bug has been removed. The old plugin would delete the last element if it began with the same characters as the delimiter.
Mouse Wheel events can now broadcast to Mouse listeners when movies are published for Flash Player 6 SWFs.
Seamless tabbing in the ActiveX Flash Player can be disabled via &li;param name="SeamlessTabbing" value="false">
Flash Player supports a new ActionScript API called System.security.loadPolicyFile. This enables cross-domain policy files to be placed in more flexible locations than was previously possible.
Furthermore international, stability, debugging, memory management and cosmetic issues have been fixed. Looks like a great job Macromedia! Thank you!
Read all the release notes for Flash Player 7,0,19,0 here.