me@my-ubuntu:~$ sudo apt-get install flashplugin-installer
[sudo] password for me:
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 firefox : Breaks: adobe-flashplugin (<= 11.1.102.63-0oneiric1) but 10.0.22.87-1 is to be installed
 flashplugin-installer : Depends: update-notifier-common (>= 0.119ubuntu2) but 0.117ubuntu3.2 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).