I just updated itunes on my macbook so that i could sync my new ipad. Wouldnt let me unless i upgraded itunes. I downloaded and had to restart the computer for it to take effect. It began installing but after 15 minutes it was still not done. It hung at about 95% completed for almost all of that 15 minutes. Then my computer shut off because it ran out of charge. When i restarted with the battery charger plugged in it gave me this message. It seems like a familiar topic on some forums although the number after cpu 0 caller seems to vary. Can anyone help me out please????