Hi Chris, thanks for the interest.
I could not open any mov file anywhere. QT, FCP, Compressor, AE, nothing. So I used pacifist and downgraded QT 7.7 to 7.6.9 and now everything works as expected again. It really pisses me off this kind of thing.
I lost 2 days of work and some money because apple releases an update that screws everything up.