Do files created by other applications play in the same version of QuickTime Player on that computer?
In other words, are you sure that QuickTime Player is working on that computer?
AAARGH! I've reported on the wrong version. I'm not using CS3 - it's CS4 (0.0.2). My big apologies.
Thanks for the response.
I tested QT with similar files that were made with AE7. There is no issue at all.
There's something with these files that were make with AE CS4.
I was just wondering if anyone else had similar issues crop up.
I'm going to mark my own question answered. After 2 days of not being able
to replicate the problem I'm calling it a mercury-in-retrograde anomaly. The problem files will still not be recognized as movie files but render after render since then yields a good result. My apologies for any inconvenience.