This year’s Berkshire Hathaway annual shareholders meeting will feature many of its usual trappings: from its venue at Omaha’s Qwest Center to its crowds of disciples; from the spectacle of an event renowned for celebrity cameos to home-spun adages from its unquestioned star, Warren Buffett.

Yet in spite of the familiar veneer, the 2009 “Woodstock for Capitalists” may mark a departure from past years in at least one respect: some shareholders may use the meeting as a forum to air their concerns about the billionaire’s investments and Berkshire’s performance.