I would be a Windows 7 user with latest O browser and Flash plug-in. Recently Pandora stopped playing and when I try to connect Pandora tells me:

Please ensure you are using the latest Flash Player.
If you are unable or do not wish to upgrade your Flash Player,
please try a different browser.
Please check our Help page for information about troubleshooting Pandora on your browser.

Pandora does however work in IE, Firefox and Chrome... Any ideas would be very grateful...