I know Word's spellcheck won't catch everything. And it won't tell you when you have "there" in place of "their." But I always copy the text out of a nearly final PDF, paste it into Word, and run spellcheck right at the end of a project, and it ALWAYS catches at *least* one thing that proofreaders, authors, editors, and I all missed. Today it was "Commonweath" instead of "Commonwealth."
Whew.
@virtuosew There's always something. It's like a law of ... publishing?
@emily My father refers to it more universally as "The Law of Maximum Cussedness"!
@emily I found errors in my book after publication. After at least six people had proof-read the manuscript..