Boardroom power plays, disgruntled founders, and CEO switcheroos are clipping the wings of this tech high flier.
By Jessi Hempel
FORTUNE -- In March, shortly after Jack Dorsey went back to work for Twitter, the company he co-founded four years ago, he did a Q&A session with an entrepreneurship class at Columbia Business School. As students tapped away on their laptops (were they sending tweets?), Dorsey, 34, answered questions about his commitment to his new gig as Twitter's product chief. Dorsey, after all, is also CEO of Square, a hot payments business, and he returns to Twitter after a rocky run as its CEO -- the board demoted him in 2008. (Co-founder Evan Williams took over and held the job for almost two years; then operating chief Dick Costolo assumed the top job.) "Seems like a revolving door," mused the interviewer...[continued]
