Download the new flash plug-in @ http://labs.adobe.com/downloads/flashplayer10_64bit.html
- Extract the archive from the download link above.
- Close all browsers.
- Hit ALT+F2 and type gksu nautilus /usr/lib/flashplugin-installer
- This will open up a new window.
- Copy and paste the extracted libflashplayer.so file into this folder, overwriting the current version.
If you have Firefox installed you will also need to install the plugin to the following folder.
- Hit Alt+F2 and type gksu nautilus /usr/lib/mozilla/plugins
- Paste the same file into this folder, again agreeing to overwrite the current version