As of early tonight, according to the WSJ, Bancroft family members holding about 28 percent of Dow Jones's overall voting power had committed to support the $5 billion sale to Rupert Murdoch's News Corp. Add that to the nonfamily shareholders - most of whom are expected to support the deal - and that might be enough. But it leaves Murdoch with little margin for error - as noted by the Journal, many of those nonfamily shares are assumed to be in the hands of arbitragers who snapped up DJ stock after the Murdoch bid was announced. It's hard to know how those votes might be cast. Meantime, there's no hint that Murdoch would even consider raising his $60-a--share bid (as some family members are waiting for him to do). News Corp.'s board plans to meet tomorrow at 4 p.m. Wonder how many times this story is going to be updated?