GY-HM600U Firmware version 0104 November 30, 2012 Click here to update. This firmware provides the following performance enhancements: Improved S/N ratio Improved Flashband compensation performance Improved Autofocus performance JVC recommends that cameras with lower firmware versions upgrade to this version for optimum performance.   If you have any questions, please contact JVC customer support in the U.S.  at  1-800-582-5825.