Today, Adobe has pushed out a new beta for Adobe Flash Player 10, and as we've come to expect, the Linux version is too updated. This latest version of the Adobe Flash Player 10 for Linux adds support for the Flash windowless mode "wmode", Video 4 Linux 2 (V4L2) support for web cameras with Flash, new language support, improved speed, and improved stability.

There is still no native Linux 64-bit version of the official Adobe Flash Player, yet.

bit more here or here