I've just learnt from my facebook news widget about the news related to a "black out" in which today has incurred Google due to a human mistake. http://tinyurl.com/dzxcbe
I've come across the bug, too, wondering what could have been
happened. (I even tried three different browser, but always with the same negative result!).
Now that I've just learnt the news about how things seems have been going on, I'm thinking that it's really true that error and mistakes (at least with respect to a technological point of view) are (almost) always to be imputed to the human being,(http://tinyurl.com/d8apqz) cause machines do nothing more than execute what they've been told to do, therefore every mistake is (almost) always to be reconducted to man's fault.
Sometimes also bigs can fail !
Anyway Google remains always the top among search engines.