Crucial has posted a firmware update for the M4 series drives. There are several users of the M4 drive on the forums so figured this might be helpful.
Release Notes
Download the firmware from here
Source: Crucial Releases 040H Firmware For m4 SSD Series - Legit Reviews
Release Notes said:The following is a summary of changes between 010G and 040H, which are independent of operating system:
• Improved robustness in the event of an unexpected power loss.* Significantly reduces the incidence of long reboot times after an unexpected power loss.
• Corrected minor status reporting error during SMART Drive Self Test execution (does not affect SMART attribute data).
• Streamlined firmware update command for smoother operation in Windows 8.
• Improved wear leveling algorithms to improve data throughput when foreground wear leveling is required.
Release Notes
Download the firmware from here
Source: Crucial Releases 040H Firmware For m4 SSD Series - Legit Reviews