Wikipedia upgrades software, all hell breaks loose

Wikipedia was upgrading its software to a current version of Mediawiki this morning.  Things do not seem to have gone so well…

Currently, requests to en.wikipedia.org are timing out or returning the error message below. Hopefully they will get their systems sorted out quickly. While I am glad that they are trying to stay current, one would think that one of the most trafficked websites in the world would plan its software upgrades more carefully.