> It contains the full file system from the Plan 9 CD image, > unmodified, except a single line change in the kernel binary.
I can't contain my curiosity: what's the line? I once worked with a colleague who had a superstition that any one-line change to production software was almost certain to introduce a bug. (Actually what he said was "one-card change", which indicates how long ago this was.) If he had to make a modification simple enough to be done in one line, he would always combine it with some other random harmless change like renaming a variable.
