Colin, thanks for the pointer to the info that could you help with a
work-around.  Using grub2 in chained boot mode still had a similar
problem, so I've reverted back to legacy grub for now.  I've got 4 files
attached here for you.  The fdisk output, the "good" mbr now with legacy
grub installed, and two different "bad" mbr dumps.  One produces the
"module not found" described in this bug" while the other is a different
symptom, probably caused by the same problem.  Ignore that one if you
wish.  Looks like I can only add one attachment per post, so next three
files in next posts.

After operating with grub2 in chained mode fro a while, wife booted into
windows again and next time, the grub bootloader was just gone, and the
system booted straight into windows.  No idea what's up with that, but
figured I'd attach that capture as well.

Also, if you haven't seen it, there was a thread specifically about
HP/Compaq laptops having various bits of software that caused this
problem.  Given that we have Compaq laptops, it might give you some more
info to work with.  That thread is here:
http://ubuntuforums.org/showthread.php?t=1343851&page=2

Thanks for looking in to this.

** Attachment added: "Bad mbr after corruption - symptom "no module""
   
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/551721/+attachment/1691786/+files/bad_mbr

-- 
[grub2] grub fails to load again (in Lucid)
https://bugs.launchpad.net/bugs/551721
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