Or his editor did. On a book I am working on in every instance where I
wrote
"radial" engine, some genius changed it to "circular."

Maybe your editor is using the same software package that some major
newspapers have been using that does suggests word substitutions in some
cases, ostensibly to improve readability (or something). Unfortunately,
one example of its behavior was to suggest replacing every occurance of
the word "black" with "African-American".

Or so the story goes.

My first version of Word would offer some of the most amazing substitutions -
for every use of "penal", it would offer "penis" and similar faux-pasian words.

G