Isn't it great to know that even NASA has to deal with all of the crap we have to with copmuters. Corrupt Memory, Malfunctioning Hardware, Hardrive to Full..... sounds like a typical day for a System Admin.
Here's one explanation for Spirit's problems:
Can you imagine the difficulty of debugging the hardware/software remotely, with a round trip lag of several minutes?
Lots of time to read JOS while waiting for a breakpoint to hit :)
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