See correction in original post:

Snow Leopard 10.6.0 / 10.6.1 [CORRECTION] or 10.6.2 if you are not worried about video input by cards other than Active Silicon

See post about 10.6.2 QT video input issues:
http://chaldee1.gotadsl.co.uk/~richa...ead.php?t=1781

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