My older M-JPEG quicktime movies play black in Quicktime and Keynote

I was just recently asked to give a presentation that I had put together 3 years ago in Keynote. All of my quicktime movies that Keynote were using were M-JPEG and used to all play great the last time I opened my file. Since Then I've updated my OS to 10.7.1, I have a Macbook Pro, Quicktime 10.1, Keynote 09, but also have Quicktime Pro.
When I play my keynote, all of my movies come up black when they play. If I try and open my quicktime movies directly and play them in Quicktime or Quicktime pro, they also come up black. But I can open it in VLC and it plays fine.
I tried to start converting the quicktime movies using SmartConverter, but it's time consuming since I have over 50 quicktime movies that this keynote is referencing. Some of the quicktime movies are also erroring out too when trying to convert them.
Does anyone have any suggestions on how to deal with M-JPEG quicktime movies that used to work just fine? Anything I could do across the board to be able to use these rather than converting them all?
Thanks,
Dale

QuickTime in Lion is not reliable as of 10.7.1. The next OS update will fix this. Should be out tomorrow when Apple updates all of its software for iCloud.
See if your problems are gone then.

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