How good is the earthing of the Macair?

Hi all!
This is my first ever posting and I doner the answer to my question.
I just bought a brand new latest mac air 13" with all the trimmings.
When I plug the air into the mains and if you use your finger and rub around the aluminium casing I can feel 'electricity'. If I then disconnect the mains, the 'electrical' feel disappears. If I earth the case, or even hold the case firmly with the other hand, then the 'electrical' feel also disappears.
Is this normal? It's quite distracting as I end up with rather 'stressed' fingers from the electrical conductance zapping my fingers all the time.
Thanks!
Dk

I'd get my hands on a good multimeter to check what voltage you are seeing between the MBA case and electrical ground.
If it registers ANYTHING....take your MBA and charger to your local Apple store OR authorized Apple service if there's any around you.
If there is nothing around you...record the reading and contact Apple Support.

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