JUts logged onto yahoo and it seems we have yet another scam at cash machines..sorry don't know how to do links (but will learn) one day!
Where you type sin your pin number there could be a tiny little pin hole just above, it may have a sticker on to conceal the pin hole, apparently there is a cameras behind that record your pin, its sort of disguised as a piece of the cash machine,and blends int the background, I think looking at the picy(on yahoo) it would be hard to spot! especially at this time of year where everyone dashing to the cash points.