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• Facebook has a big mysterious press conference scheduled for today. Here's the speculation.

• A Belgian group is suing Apple over an "illegal" and "misleading" warranty policy.

• An analyst cut his sales expectations for the Microsoft Surface in half.

• Is stock manipulation behind reports that iPhone 5 demand is weak?

• Palantir is worth $5 billion on secondary markets, with offers reaching as high as $8 billion, says cofounder.

• Jack Ma will quit being Alibaba CEO in May.

• Another Yahoo exec is out, and Marissa Mayer may send more on their way.

• The Pentagon thinks Twitter may be able to predict the future.

• For some reason, Apple's "Find My Phone" feature directs people to this one guy's house, even though he doesn't have their phones.

• This is how Apple sets its prices.

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