Sean booked a flight on United Airlines, US Airways, but had found the flight through travel übersearch site Kayak. He learned the hard way that there may be an occasional bug in the system: he says that even though he did everything correctly, his flight was booked on the wrong day. He learned the hard way that when this happens, you’d better notice quickly: there’s only a 24-hour window to call about the error before the airline will just keep your money forever. They’re called “non-refundable” tickets for a reason, after all. [More]