fixmbr (XP-Pro) gets me:
    "an invalid or nonstandard partition table signature is detected",
    (and I am prompted whether I want to continue.)

(Warning)
    "If you are not having problems accessing your drives,
    you should not continue. Writing a new master boot record
    to your system partition could damage your partition tables
    and cause your partitions to become inaccessible."

Where can I find out more about the exact nature of what is "nonstandard"?
The MSKB is not much help finding the specifics, (as far as I can tell).

                          TIA    Rick Glazier

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