raring is dead..sooooo
Ugh, I keep forgetting that 3.8 is Raring.
SInce the sources don't work we can change them to Trusty or Saucy, the problem is, that if you run upgrade it could quite easily kill your system...or not..could jsut upgrade it, but it is iffy.
Technically the plugin should still be there, could test with a Flash Game
http://www.flash-game.net/game/6763/sna ... story.htmlOtherwise you could open sources.list with a root editor(not the Ubuntu Updater) and replace saucy with trusty and then try again.
Afterwards, you could add # to the lines so they don't invoke Ubuntu Updater to bother you all the time.
If it works, it is easier just to remove the error provider as I gave you previously. All this does is kill the error.
For long term use it would be better to not use 3.8. I have raring (Diamond2bKDE)running on my Lenovo, but I built the distro so I know my way around it plus it is pretty packed to begin with. Also I run like...way too many systems(except Ultimate Edition..idk, it is always a problem, least for me since 3.6, and I use KDE, and Ultimate Edition KDE is terrible) Other than that I wouldn't touch it. Been down that road before, and even though I am more equipped to handle it, it really is a huge pain.