UPDATE 09/27/2010: Looks like the bug is finally fixed, as you can see here https://launchpad.net/ubuntu/+source/nspluginwrapper/1.2.2-0ubuntu6.10.04.1/+changelog. At least on Ubuntu 10.04 and earlier. Hopefully we won't need this workaround anymore..
Since we don't have a native 64bits flash player, using flash on a 64bits Ubuntu installation requires a wrapper. Installing flash by the package flashplugin-installer does that automatically for 64bits users.
But, at least for Firefox (Chrome/Chromium are supposed to be fixed) there's a bug that prevents users clicking on Flash content (ex. Youtube videos). Let's hope that bug gets a fix quickly!
In the mean time, you can use a workaround to get things working normally again! Here is what you do: (these steps were written originally in the description of Launchpad Bug #410407 )
- Press "Alt + F2" and run the command:
gksudo gedit /usr/lib/nspluginwrapper/i386/linux/npviewer
- After the LAST text line, insert that:
Now, restart your Firefox (or the browser you are working in) and see if the issue is gone!
For helping this bug gets fixed, hit the Affects Me button on the bug page to get the developers attention!