If you use the Twitter client/service TweetDeck, you should log out and log back in to block a security vulnerability that quickly spiraled out of control last week, resulting in a torrent of out-of-control retweets. Twitter took TweetDeck offline until the bug could be fixed, but all should be well now. follow link
Calculate with Spotlight
Have a quick calculation to perform? Don't bother opening Calculator, simply enter the calculation into Spotlight's search bar, and Spotlight displays the answer as the top item. To perform further calculations, hit Return, or click the answer, and Spotlight launches Calculator.
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All Hands off TweetDeck