Once is never enough when it comes to proofing and spellcheckers are only one step along the way. They may help point out problems with grammar and punctuation - or create them - but they can't alert you to a correctly spelled but unintended word.

An item on Ananova.com points out how this can be even more distressing than fielding calls from readers who have spotted your goof. "My interests include cooking dogs" notes that resumes and curricula vitae often contain unintentional errors that doom the applicants' chances of landing a job. That would certainly be true at a publishing house - take note, prospective contributors.