WILMINGTON, Del. - Liberty Mutual Insurance Co., a creditor in the Chapter 11 bankruptcy of Filene's Basement LLC, on Aug. 22 filed a brief in the U.S. Bankruptcy Court for the District of Delaware, objecting to Filene's second amended plan of reorganization (In Re: Filene's Basement LLC, No. 11-13511, Chapter 11, D. Del. Bkcy.).