Kernel panics reported all over the net after installing the latest Thunderbolt driver update on 10.7.4 on MBP's.... all models. It will not load, and on reboot will cause kernel panic that will require a reload of Lion from recovery mode. Many, many people having the issue and Apple has yet to address it. I'm on my SECOND reload of Lion from the Recovery system after having finally found out what caused the issue in the first place. GRRRRRR!!! You have been warned!