Screen become pixalated when I move mouse

When I am on Safari news  and move my mouse the screen become pixelated.   Has anyone else experienced this problem ??

Try running Firefox in [[Safe Mode]]. If it functions properly in that configuration, then one of your add-ons is the culprit.

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    Try the Firefox SafeMode to see how it works there. <br />
    ''A troubleshooting mode, which disables most Add-ons.'' <br />
    ''(If you're not using it, switch to the Default Theme.)''
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    ''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
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    http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes
    ''When you figure out what is causing that, please let us know. It might help other user's who have that problem.''

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