Dungeons & Dragons & Find & Replace
From "Writing Precise Rules" in The Kobold Guide to Board Game Design:
"In a 16-page section of the 1994 D&D suppplement, Encyclopedia Magica, Volume 1, an editor haplessly and globally replaced all occurences of "mage" with "wizard," leading to such epic passages as "The user may look into the ball, concentrate on any place or object, and cause the iwizard of the place or object to appear," and "The tower can absorb 200 points of dawizard before collapsing. Dawizard sustained is cumulative, and the fortress cannot be repaired (though a wish restores 10 points of dawizard sustained)."