I am using Ubuntu 11.04 and current versions of Google Chrome and Chromium. But in both of them flash player is not working. I can watch youtube videos properly. In other sites; it says missing plugin. Also I have installed Adobe Flash Player from Ubuntu Software Centre. I have looked for solutions from internet. I found nothing. One of my friends has just installed Ubuntu and he says i can't watch, too. Is there a solution? Or it's because we use Ubuntu in Turkish? What should i do? It's becoming really annoying.
The problem is that Google Chrome (but not Chromium, the basis, and almost an exact replica of Chrome) comes with it's own Flash plugin. I don't know if that stops it from using other plugins, but im guessing so, unless you edit the plugin path.
Try Chromium, which is available through the repos and is almost identical to Chrome, and test to see if that works OK. If not, reinstall the flashplugin-installer package, to reinstall the plugin
One fix that seemed to work for me is this. Go to the Adobe Flash Download page and download the appropriate one for your OS & version. That seemed to fix most of my issues and problems.
If you are not affected by the problems described there or if the solutions doesn't work, then you could disable the plugin bundled with Chrome. You can do that by typing about:plugins in the address bar, then clicking the Details. Additionally, you could try to use Flash-Aid on Firefox to install flash and fix some issues. As long as you disable the bundled plugin in Chrome it will pick up the one use by Firefox. Just make sure you disable the option to Override GPU validation in Flash-Aid Wizard, because YouTube currently has an issue with that.
This post has instructions for copying the flash plugin from firefox to chrome.