Lucid Lynx comes with version 10.0.45 which has some problems with compiz. The problems are buttons not working and unable to right-click to enable or disable hardware acceleration. To solve this issue I upgraded flash to 10.1 beta 3

You first need to make sure you’ve installed flash from the Ubuntu repositories as this sets up all the correct symlinks. To do this from command line:

sudo apt-get update && sudo apt-get install flashplugin-installer

Now download flash 10.1 beta 3 from Adobe and unpack it:

wget http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_1_p3_linux_022310.tar.gz
tar -xvf flashplayer10_1_p3_linux_022310.tar.gz

Backup the old libflashplayer.so:

sudo mv /usr/lib/flashplugin-installer/libflashplayer.so /usr/lib/flashplugin-installer/libflashplayer.so.old

Then replace with the newly downloaded one:

sudo cp libflashplayer.so /usr/lib/flashplugin-installer/

Now relaunch your browser and do about:plugins. You should see it displayed like this:

Enjoy your new flash plugin!