Adobe Flash Player "Square" is a preview release that enables native 64-bit support on Linux, Mac OS, and Windows operating systems, as well as enhanced support for Microsoft Internet Explorer 9 beta. We have made this preview available so that users can test existing content and new platforms for compatibility and stability. Because this is a preview version of Flash Player, we don't expect it to be as stable as a final release version of Flash Player. Use caution when installing Flash Player "Square" on production machines.
The key new capabilities in the Flash Player "Square" preview are: 64-bit support--Native support for 64-bit operating systems and 64-bit web browsers on Linux, Mac OS, and Windows; Internet Explorer 9 hardware accelerated rendering support--Enhanced support for Internet Explorer 9 Beta. It takes advantage of hardware accelerated graphics in Internet Explorer 9 Beta, utilizing hardware rendering surfaces to improve graphics performance and enable seamless composition.
Important: Please note that if you install the Flash Player "Square" preview, you will need to keep this version up to date by manually installing updates from the Flash Player "Square" download page on Adobe Labs. You will not receive automatic update notifications for future final releases of Flash Player, and you will need to manually uninstall Flash Player "Square" before installing a final shipping version of Flash Player.