10/29/2012 10:20 am ET

10 Things Google Doesn't Want You To Know

When it comes to mobile devices, maps and retail, the know-it-all of the Internet suddenly doesn’t have all the answers.

1. “We know what you did last summer.” Google, the giant search-engine company, has looked unusually vulnerable lately: It rattled financial markets on Thursday when it announced a 20% drop in third-quarter profits — and it accidentally released the results prematurely, to boot.

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