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Videos on the Vimeo.com will not play, but Vimeo imbeds on other sites will; the problem comes up with videos from some other sites as well, but not Youtube.

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The problem is as described. You Tube does work, but the picture does have a very annoying flicker (which may or may not have anything to do with the Vimeo problem). By 'not play' I mean that the site loads, the graphics display properly, the pause bars and the play arrow change places when clicked, but nothing happens - no sound or picture.

The problem is as described. You Tube does work, but the picture does have a very annoying flicker (which may or may not have anything to do with the Vimeo problem). By 'not play' I mean that the site loads, the graphics display properly, the pause bars and the play arrow change places when clicked, but nothing happens - no sound or picture.

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Some problems with Flash video playback can be resolved by disabling hardware acceleration in your Flash Player settings. (See this article for more information on using the Flash plugin in Firefox).

To disable hardware acceleration in Flash Player:

  1. Go to this Adobe Flash Player Help page.
  2. Right-click on the Flash Player logo on that page.
  3. Click on Settings in the context menu. The Adobe Flash Player Settings screen will open.
  4. Click on the icon at the bottom-left of the Adobe Flash Player Settings window to open the Display panel.

    The image "fpSettings1.PNG" does not exist.
  5. Remove the check mark from Enable hardware acceleration.
  6. Click Close to close the Adobe Flash Player Settings Window.
  7. Restart Firefox.

This Flash Player Help - Display Settings page has more information on Flash Player hardware acceleration, if you're interested.

Does this solve the problem? Let us know.