Dropbox kicked off 2013 with the first major outage of the year. What initially appeared likely to be a short-term system hiccup on Jan. 10 actually turned into an outage of slightly more than 15 hours. The problem, which involved a synchronization issue between the client software and the servers, provoked the usual stir on the Internet as users checked to see if the outage was an isolated circumstance or something happening on a system-wide basis. Service was restored the following morning. Dropbox had previously been taken down during last year's Amazon Web Services crash in October.