After installing PR1.3 the Gtalk video stopped working on my N9(64GB). The video call button disappeared. When making a normal call, the call is immediately cut on answer. My wife has the same phone, but 16GB version with the same OS update. She can see the video button, me active on Gtalk and make a call to me, which I can answer.
I took the Phone to Nokia care. First they changed some wires. Did not help. Took it back and the chip-card was changed with no help. The phone was on a way 2,5 months.
It is difficult to imagine where the problem is, because some phones work all right and others don's. Some have stopped worked after the PR1.3 installation.
Anyway, Nokia should take care of the problem.