http://www.crucial.com/support/firmware.aspx#
Release Date: 11/16/2010
Change Log:

•Improved power management
•Improved power-up behavior after uncontrolled power-down
•Improved full drive and corner-case performance
•Improved TRIM behavior
Note: This is firmware from Revision 0002 to Revision 0006. It will not work for updating between any other versions. If your drive has Revision 0001 firmware, then you MUST first perform the intermediate step of updating to Revision 0002.