sudo aptitude install flashplugin-nonfree
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Reading extended state information       
Initializing package states... Done
Writing extended state information... Done
The following NEW packages will be installed:
  flashplugin-installer{a} 
The following packages will be upgraded:
  flashplugin-nonfree 
The following partially installed packages will be configured:
  nspluginwrapper 
1 packages upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 20.9kB of archives. After unpacking 53.2kB will be used.
Do you want to continue? [Y/n/?] y
Writing extended state information... Done
Get:1 http://sa.archive.ubuntu.com jaunty/multiverse flashplugin-installer 10.0.22.87ubuntu2 [19.1kB]
Get:2 http://sa.archive.ubuntu.com jaunty/multiverse flashplugin-nonfree 10.0.22.87ubuntu2 [1766B]
Fetched 20.9kB in 8s (2528B/s)                                               
Preconfiguring packages ...
dpkg: error processing flashplugin-nonfree (--purge):
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting a removal.
Errors were encountered while processing:
 flashplugin-nonfree
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up nspluginwrapper (1.2.2-0ubuntu5) ...
plugin dirs:
Auto-update plugins from /usr/lib/mozilla/plugins
Looking for plugins in /usr/lib/mozilla/plugins
Auto-update plugins from /usr/lib64/mozilla/plugins
Looking for plugins in /usr/lib64/mozilla/plugins
Auto-update plugins from /usr/lib/firefox/plugins
Looking for plugins in /usr/lib/firefox/plugins
Auto-update plugins from /usr/lib64/firefox/plugins
Looking for plugins in /usr/lib64/firefox/plugins
Auto-update plugins from /root/.mozilla/plugins
Looking for plugins in /root/.mozilla/plugins
Reading package lists... Done             
Building dependency tree       
Reading state information... Done
Reading extended state information      
Initializing package states... Done
Writing extended state information... Done