So I just got my new crucial m4 256gb today. I used CCC to copy my drive, then installed it into my computer. Things were running smooth till I started to update the rest of my files. After a while, my files were erroring out when I tried to install. I got another error when I shut down, and the mac tried installing more files. Upon restarting, my computer kernel panicked. I used my recovery partition to try to repair/verify the disk and permissions, but disk utility said nothing was wrong. I was only able to get the computer working again by re-installing lion. My question is, is there any way to prevent this from happening again? I have firmware 000F (the latest) and don't think I did anything wrong. Thanks for all help! edit: A few more pieces of information. I did not enable trim, I have hibernate disabled, and the files that were updating were through apple's software update. I had also booted the drive several times through my external drive dock to make sure it was functioning before putting it in my computer. The computer is an early 2011, 15 inch MBP.