Leap Second bug takes down a bunch of other sites

Reddit, Foursquare, Mozilla and a number of other companies were hit with technical problems Saturday evening when a single “leap second” was added to the world’s atomic clocks. And so was born the “leap second bug.” … The Linux operating system, the Java application platform and many other sites that depend on them were affected. They use the Network Time Protocol to keep themselves aligned with atomic clocks. When the extra second was added, the software platforms didn’t know what to do with it.