Ok first let me start by putting this in context. I have a 4 or so month old 1 Ghz iBook. Because of a pressure wound I can't sit down for extended periods of time so I often lie on the ground with a pillow and watch tv with my book on my lap. If I sit with my ibook on my stomach t I would fell a kind of zap. At first I thought it was the screws on the bottom heating up and burning me but after touching them I found this not to be the case. I soon found out that the button to open the case also gave me a zap. Then I did the good old 9 volt test and touched the tip of my tongue to the button and wouldn't you know it it zapped me. I soon found out that any metal part be it the open button the screw or the battery opening screw all zap me. I took my dads voltage tester and it told me that there was .190 of a volt coming off the metal on the book. I also found out it only happens when it is plugged in and charging now is this a normal occurrences or should I look into it more?