I rendered frames 300-400 using the settings you had other than the codec (which didn’t seem to be a problem anyway) I rendered as a QT using PNG, and it rendered fine. VLC had difficulty playing it, but I brought it into After Effects and it played fine.
I’m running Cinema R14, QT 7.7.6 on Windows 7 64bit
I’d say check your version of QT, but other than that, sounds like reinstalling might be the next step.
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Tim Shetz
c4dtraining.com