it was not upgraded to 10.8
10.8 (Mountain Lion) requires that you have an Intel powered Mac or it will not install.
Go to Safari Preferences > Extensions and see if there is a Flash Player extension there.
You might want to update your Adobe Flash Player too.
P
From what I can gather, my MacBook which has been upgraded to 10.8 but is not Intel will no longer allow Adobe Flash to run the videos. When trying to open a video, the message "Blocked plug-in" comes up. My Safari preferences doesn't seem to have a solution either.

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