File corruption pattern

[Bill Gradwohl]

These all look like single bit errors. Does the mainboard support RAM 
parity checking, is it turned on, and are you using RAM with the 
necessary parity support?

If any answer is "No", then this could be the result of random RAM 
failures that are not being caught. Fix whatever needs fixing (BIOS, 
mainboard, RAM) to get parity support and then see if the problem 
disappears or you get real failures reported by the hardware.

-- 
Bill Gradwohl
bill at ycc.com
http://www.ycc.com