I was working on a non-fiction thing once for someone else, and a rather long Greek religious title (can't remember which one exactly
) got auto changed in Word to 'Prophylactic', in numerous places.
I didn't find it until an hour before I hit send ....
Oh dear. That must have been such fun, changing everything back the right way.
I get the same thing with OpenOffice Writer. Its default setting is to AutoCorrect, and I am going to have to go in, probably tomorrow when I write my short story second draft, so I can change it.
And I will likely forget about the needed changes until I've spelled one of the fantasy names in the piece (maybe even the title -- oh joy!) and have it changed as I type it.
An error I found in my present WIP, actually occurred while I typed on the Olympia. I wanted to write the word 'designed'. I did not think about the spelling as I typed it, until I realized I had put too many letters in. I had to quickly strike out the word 'disegnigned' and then re-spell it properly behind it. (That's what I get for not having any of that black ribbon with the correctable stuff on the bottom, but it's definitely good for writing first drafts; makes me have to think, which I like!)