Since upgrading to Lion, I cannot play QuickTime videos in Safari 5.1.1, not even on Apple's own website?

Upgraded to Lion and now I cannot watch QuickTime videos in Safari 5.1. Did not have this problem in Snow Leopard. QuickTime videos do play in Firefox. I cannot even play QuickTime videos on Apple's own website. Any suggestions? I'm using a Macbook Core 2 Duo.

Hi Sami,
I have partially solved my problem. I had software installed for a Twelve South BassJump (it improves the sound of your laptop speakers). When I removed that software, I was able to play videos on Apple's website in Safari. The company has beta software available from their website that is supposed to be Lion compatible but when I installed that the problem returned. But even with that software removed I still cannot watch videos on some sites such as Other World Computing.
I just got a new Macbook Pro yesterday with Lion installed from Apple and all video plays fine. So I believe there must be some compatibilty issues with some plug-in. I have Perian and Flip4Mac installed. I removed 3ivx and the problem still remains. I've read conflicting opinions as to Perian being Lion compatible.
Everything works fine in Firefox at this point so at least I have that to fall back on.
Check your system preference pane under "other" and tell me if you have any of the plug-ins I mentioned installed. Maybe we will be able to see a common culprit.
Let's keep each other posted.
Thanks,
Chris in Ohio (USA)

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