Question: When I try to watch Youtube videos in Google Chrome on Ubuntu Quantal Quetzal, I get the following "Couldn't load plugin." message.

![enter image description here](https://i.stack.imgur.com/gG72k.png)

I tried to go to "Wrench" -> Tools -> Task Manager in Google Chrome, close the Shockwave process, and reload the page with the Youtube video, but the problem persists.

Am I missing a plugin? What is erring?

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**Update**: 

Thanks everyone! You're awesome.

After a while I finally solved the problem. After going to `chrome://plugins`, I found that I had a mysterious plugin called `libpepflashplayer`. I disabled it, and now, I can play Youtube videos. Here's how my `chrome://plugins` settings look like now.

![enter image description here](https://i.stack.imgur.com/kulxx.png)

However, is this a good way to solve the problem? Is there a deeper problem I may be having? Like my Chrome browser not updating correctly?

Answer: 
I'm using a different version but maybe this helps you anyways.

I had this problem with the latest dev channel. `Version 26.0.1397.2 dev`

I fixed it by deleting the folder `PepperFlash` in `.config/google-chrome/` and `.config/google-chrome/Default/Pepper\ Data/`, for some reason there is a copy of of the .so file for the pepper flash plugin, which is not really needed because there original copy on `/opt/google/chrome/PepperFlash/` should be loaded as well which may be causing a conflict or something.

Make sure to backup your whole `.config/google-chrome/` folder just in case.

I don't use the standalone flash package anymore, just the pepper flash version included with Chrome, just in case you are wondering.
You may have to reinstall the Adobe flash plugin even if you already have it installed. Then go to `chrome://plugins/` to make sure that it is enabled in Chrome.