According to the Skype blog, the outage many are still experiencing came about because of Microsoft’s Patch Tuesday.  The details are still a little sketchy as to exactly what happened, and why this particular patch had more effect on the Skype network than previous Patch Tuesdays.  Keep an eye on Ars Technica’s article for updates.
“Skype has finished its sleuthing and is ready to report on the conditions which led to the company discovering a flaw in its P2P networking code. The culprit? It turns out that Skype’s code wasn’t prepared for a massive restart of PCs caused by the standard Windows patching process. Related Stories

“The disruption was triggered by a massive restart of our users’ computers across the globe within a very short timeframe as they rebooted after receiving a routine set of patches through Windows Update.”

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