Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Apple's First iPhone 4s Commerical Being Aired Right Now –
We have had a few of you contact us saying that you have just seen the new commerical for Siri and the iPhone 4s. That is totally true , The commerical shows of all the uses of Siri in real life situations for all them people who think the excitment over Siri will be forgoten with in weeks. The commerical does not seem to talk or show any other features of the iPhone 4s for example the 1080p videoing capablities and also the 8mp camera. We will add the video to this article as soon as it is online. If you happen to see it on you tv screen please record it and send it over to Tips@mac-reviews.net.