current leakage of MacBook Pro? I can feel current leakage on my MacBook Pro when it is being charged. And it seems a lot of people in my country report the same problem. 

Is this because of the voltage(220V) we use?

What's the solution? 

UPDATE I went to Apple Store(Shanghai, China) several hours ago and they refused to do anything. weird company. I bought my MacBook Pro 3 months ago.
The solution for me was to use the adapter with a three pin extension cord.

Then your notebook is earthed and no more charges stay on the cover that shock you :-). Some Macbooks suffer from insulation failure of the casing. A third contact provides for a connection to earth ground so that net charge can escape the cover. This requires a wall socket with proper earthing.