I tried to update the Thunderbolt Software Update 1.2 that release today, but it got error and force me to restart the computer. After restart i got the kernel panic and can't enter the OS anymore not even safe mode. I have it restore to my backup and its working but when i attempt to update the Thunderbolt software it happen again. I check all the hardware when i got in after the backup and all the status is "Ok".
I've the same problem ... http://forums.macrumors.com/showthread.php?p=15013864 [MacBook Pro 13" 2011, 2.3GHz Intel Core i5, 8GB 1333MHz DDR3, HDD 320GB, OSX 10.7.4]