One of the most expensive bugs in history... In 2004, the UK’s Child Support Agency invested in a new IT system that was supposed to speed up child support payments. Unfortunately, the complex system contained a number of bugs. The result? 1.9 million people were accidentally overpaid, another 700,000 were underpaid, and a backlog of 239,000 cases very quickly built up. The total cost of this shambles? Over half a billion pounds – enough to bring every support engineer out in a cold sweat: “You have 30 missed calls”...