Quicktime not working after loading Lion. It is in Applications folder. It is dark when trying to play. Audio is there, no video. Is something set wrong?

Quicktime not working after loading Lion. It is in Applications folder. It is dark when trying to play. Audio is there, no video. Is something set wrong?

It is supposed to be dark.
Is it all videos that don't display or just some. You may have installed something like Perian or Flip for Mac that translates the video codecs for Quicktime. They may need updating.

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