IBM says it thinks it knows who was responsible for tying up its vital internal V-Net worldwide communications network tighter than the New Jersey Turnpike on a wet day or the M4 to Heathrow when you’re late for your plane (CI No 835), but it ain’t naming the culprit who loaded the innocent looking Christmas message into the system, although according to the New York Times, evidence points to the outside: wearing a tight seasonal smile, the company is treating the incident lightly – it reckons that if it really gets cross about it, there will be a host of mischief-makers queueing to improve on the trick.