Flash not working in Safari 5

Flash has been buggy for me in Safari 5, ever since I updated the Flash player last week to "10.1 r53". Either Flash files don't play at all, or just the audio plays without video.
Per the instructions on these boards, I have:
1. reset Safari
2. uninstalled flash player
3. installed the flash player
4. repaired permissions
5. restarted
The issue is still there. Firefox plays Flash files, YouTube, etc. just fine. Safari does not.
I'm running SL 10.6.4, latest Software Updates.
Any suggestions?
Thanks!

I created a new account. Flash works in the new account. That's cool, but I really don't want to re-locate all my prefs, etc., just for a buggy plugin.
So, I next...
1. grabbed the Safari plist from the new account
2. logged out of the new account
3. logged into the old account (where Flash does not work)
4. moved the old account's com.apple.safari plist file out of the Preferences folder
5. moved the clean Safari plist file (from the new account) into the Preferences folder
6. reset and restarted Safari
7. Flash worked...for about two minutes. I tested on YouTube, Vimeo and Google Analytics. Back to Flash not working in Safari.
I then tried repeating the earlier steps.
1. reset Safari
2. uninstall flash player
3. install flash player
4. repaired permissions
5. restarted
Still doesn't work.
Just one other thing to note: whenever I pull up a web page with Flash, I get a "file not found" error in Safari's activity monitor (link is below)...could this be an error with Adobe's website rather than a Safari-permission thing?
http://fpdownload2.macromedia.com/get/flashplayer/update/current/install/version .xml10.1.53.64~os=Mac&osVer=10.6.4&playerType=pl&cpuWordLength=32&cpuArchitectur e=i386&lang=en

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  • I have downloaded the latest Adobe Flash on my laptop and it is not working on safari for youtube.I have uninstalled and installed it multiply times and it still wont show me youtube videos

    I have downloaded the latest Adobe Flash on my laptop and it is not working on safari for youtube.I have uninstalled and installed it multiply times and it still wont show me youtube videos

        Enable Plug-ins
        Safari > Preferences > Security
        Internet Plug-ins >  "Allow  plug-ins"
        Enable it.
        Press " Manage Website Settings" button for more options.

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