Quicktime will not play .mov files since Lion installation

When using Quicktime 10.6, I am receiving the error message "...file could not be opened. A required codec isn't available." when attempting to open .mov files.  Prior to installing OS X Lion, there were no issues with playing .mov files.

I'm having the same problem. Using a clean install of Mac OS X (10.7) Lion and QuickTime 10.1. 
If I go to finder:
I can click on Icon's Play arrow and the Movie will play in the icon.
I can click on the file icon and press the spacebar and the file will play in QuickLook.
If I doubleclick on the icon to open the file in QuickTime, I get the "...file could not be opened. A required codec isn't available." message.
If I right click on the icon and click open with... QuickTime, I get the "...file could not be opened. A required codec isn't available." message.
MBP, Mac OS X (10.7)

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