Flash 10 just came out a few days ago, and I just installed it using the information provided on Ubuntu Forum (I used the script from here to install on my 64bit Ubuntu).The performance of Flash 9 on Ubuntu 64 had been suboptimal. Even with a nVidia GForce 8600 graphics card, I could not view any flash based videos using full screen (1920×1200) due to the extremely low frame rate. Flash 10 seems to have made significant optimization improvement under Linux and the full screen video performance right now is superb.
The performance improvement in Flash 10 should bode well in the Linux community as native flash performance had been one of the major issues for users to switch from Windows to Linux.
