I just did a clean install on my macbook, with the 2.0 ghz core duo, 1.25gb ram, 80 gb hard drive, and everytime I do a clean install it is ok. I perform updates, and I have narrowed it down to the combo update to 10.6.5 being a problem, as everytime I do the update it causes the laptop to run into a kernel panic and the screen where it says you need to hold down the power button. I have done this 4 times and everytime it is the same error. I just now done a clean install and tried doing a manual update to 10.6.1 and I have the same exact problem. Any idea? This is very annoying.