Tens of thousands, perhaps millions, of Google Chromebooks, widely prized by schools due to their low cost and ease of configuration, were reported to be offline for several hours on Tuesday. The apparent cause? A seemingly botched WiFi policy update pushed out by Google that caused many Chromebooks to forget their approved network connection, leaving students disconnected.

Source: Apparent Google update glitch disconnects student Chromebooks in schools across the U.S. – GeekWire

Ouch – the dangers of cloud!