I had DebXO Squeeze installed on my XO. Yesterday, I ran apt-get upgrade, and it caused all sorts of havok. The trackpad no longer worked, for one thing.
So, I reinstalled DebXO, and followed the instructions for upgrading to squeeze. http://wiki.laptop.org/go/DebXO#Updating
I got an error message saying that it required the latest kernel. I didn't get this error message when I originally upgraded to squeeze, about a month or so ago.
So I'm sticking with Lenny for now.
Is anybody else using DebXO experiencing this problem, and maybe even found a solution?