Built-in cam no longer works after installing snow leapord

Since I upgraded to Snow Leopard on my MBP, my built in cam is no longer recognized by the system. It's not application specific as I've tried several apps and I've looked at the System Profiler app and it's not listed in there.
I've tried several potential fixes and none have worked. I've tried the SMU thing, the PCU thing, the Permissions fix, and have updated my OS.
What can I do?

mmh! Have you actually phoned Apple or is there an Apple store near where you live?
That would be the only thing, I could think of.
And have you tried starting the machine in safe mode at all and see if that makes a difference? If so, it must be a piece of software (have you looked at QT X, as this, with a standard install, would remove QT 7.x as this is only available as "optional" install, and will then appear under applications/utilities).

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