Employee was stacking 50 lb bags onto pallet when he felt a sharp pain in left arm and shoulder. Doctor believes it is a rotator cuff injury and may need surgery. No lost time as yet. Edoc 154045 corrects the date of injury to 01/04/2005 from 01/01/2005. Surgery was eventually performed on 02/11/2005: 5 days lost time and on light duty until spring - update will follow.