QuickTime 7.1.6, looks like they fixed the CanSecWest issue everybody was talking about:
This update addresses the issue by performing additional bounds checking when creating
QTPointerRef objects. Credit to Dino Dai Zovi working with TippingPoint and the Zero Day Initiative for reporting this issue.
That's what, a couple of weeks or so from release to fix? Not shabby, Apple, particularly compared to previous record. Keep it up. I've applied it to my scratch iMac, so I'll see what happens.