I should add, I did have a 486 system that was a poster child for the sig-11 FAQ, and I did
have a filesystem get hosed by a bitflip on a machine I built w/ 512MB RAM that wasn't ECC.
(The machine had nearly a year of uptime and not much load. A bitflip on a disk buffer wasn't
actually all that unlikely.)
My current boxes all get ECC RAM now, and tons of extra cooling.