Berkshire says regulators probe its books By Jonathan Stempel Sat Aug 6, 8:40 PM ET Warren Buffett's Berkshire Hathaway Inc. (NYSE:BRKA - news) (NYSE:BRKB - news), whose General Re Corp. unit has been investigated over its role in helping insurer American International Group Inc. misstate results, said governmental authorities were inquiring about some of its own accounting. In its quarterly report filed on Friday with the U.S. Securities and Exchange Commission, Berkshire said the authorities were looking into the accounting by some of its insurance subsidiaries for finite reinsurance. Investigators have for several months in an industrywide probe been questioning...