Adobe Flash Player 10.1 to cooperate with private browsing modes
According to a post on NeoWin, Adobe is working to make sure that Flash 10.1 will play nice with the private browsing offered in most current browsers. Once you close your session, Flash Player will automatically clear the pertinent locally cached files. Visited a site with a Flash-powered login system? Any locally stored objects (LSOs) they create will also be purged.
On top of that, non-private instances of the Flash player won't have access to data created by those running in private sessions.
Right now, Adobe has things working with Google Chrome, Firefox 3.5 (or newer) and Internet Explorer 8. While Safari offers a private mode, support isn't quite there just yet. Expect to see it arrive before Flash 10.1 is released to the public.