Contrast this with last October's buy-out of Neiman Marcus, a Dallas icon and a rival of Macy's, led by Texas Pacific and Warburg Pincus, two private-equity firms.

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"The Guy Fawkes mask has now become a common brand and a convenient placard to use in protest against tyranny - and I'm happy with people using it, it seems quite unique, an icon of popular culture being used this way, " he says.

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From the instant you click the TweetGenius icon on your homescreen, it's very apparent that this particular app was created with a heavy emphasis on eye candy.

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This is easily discovered with a quick look at the URL. Before buying online, look for the padlock icon at the side of your address bar to ensure safety.

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