I guess you've heard the good news, that Adobe released yesterday (November 17th, 2008) the first 64-bit version of its Flash Player for Linux-based operating systems. Until yesterday, 64-bit Linux users had to install the 32-bit version of the Flash Player, which was forced to work with the help of the NSPlugin wrapper package. Moreover, the "grey box" issue in Firefox 64-bit for the Ubuntu 8.10