10/08/2012 08:35 am ET Updated Dec 08, 2012

Jack Dorsey's Role At Twitter Reduced Because He's 'Difficult To Work With'

Given that Jack Dorsey helped found Twitter, you'd expect him to have an integral role in running the company. There's a reason that current CEO Dick Costolo brought him back into the fold after a two and half-year hiatus. Except it's not that simple.

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