Recently Flash Player 8 Public Beta is updated with lots of bug fixes.

Must check: http://www.macromedia.com/software/flashplayer/public_beta

• No longer prompt the user to close window during product install mechanism
• Note, if anyone is using Windows build b400 (Beta 1) or ANY Mac beta build, you should downgrade to FP7 if you want to see the new experience. These builds are not suitable upgrade vehicles to the new build using Lightning Product Install. If you choose to continue using those builds, you’ll see only the manual installers.

Get excited and Enjoy!