commit: fb200d8 - #595 (2014-04-14 00:44:57 -0400)
Hmmm, might just be a temporary error. Apparently it is just a bug and Google are dealing with it:https://productforums.google.com/forum/#!category-topic/webmasters/webmaster-tools/HEc9ea-emNc
THE SKY IS FALLING.
I've updated the article to include a statement John Mueller made on the Google+ thread: https://plus.google.com/111588754935244257268/posts/eBffLdEwFmK