Late last week, a federal judge in California gave preliminary approval to a settlement of the class action lawsuit regarding Facebook's Beacon program.

上周，一名加州联邦法官初步批准了一项有关Facebook Beacon(灯塔)广告计划的群体诉讼协议。

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One of the biggest pitfalls came late last year, when Facebook announced an advertising program called Beacon that broadcast news of users' online purchases to their friends.

最大的失误之一发生在去年，当时Facebook宣布了代号“灯塔（Beacon）”的计划，将其用户的在线购买信息发送给他们的朋友。

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Meanwhile, Twitter can move slowly and avoid alienating its users asFacebook did when it tried its Beacon advertising program.

同时，Twitter能够逐步改变以避免像Facebook尝试Beacon广告计划时那样疏远了用户。

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Zuckerberg has apologized for the company's Beacon ad program, which lets users track their Facebook friends' activities on other sites.

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In a blog post, the 23-year-old founder of the social networking site apologized Wednesday for privacy violations by its controversial Beacon advertising program, which broadcasts users' online purchases to friends in their networks.

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Another concern, Karp said, is that, as Tumblr grows, it will encounter from its users the kind of resistance to change that forced Facebook to shelve its Beacon advertising program and have greeted each revision to its privacy policies.

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