Howto stop a MacBook Pro from short-circuiting you

My girlfriend has read somewhere (I don't know where exactly) that the very light but very annoying short-circuits you get from the metallic case of a MacBook Pro sold in Europe is due to a failure of Apple's manufacturer to connect the earth (wire) inside the european plug, so that electricity overcharge is not removed by any other means than your arm. Well, I just tried the recommended solution: replace the plug with another one (the original cannot be reassembled once disassembled), this time connecting the earth (wire) correctly. I'm happy to say this worked out very well, apparently. It's a bit sad to have to remove the original plug for a slightly uglier one, but it was really annoying to get shocked continuously...