There's one I make all the time in my steno writting. You have to know a little about steno though. In steno, you write section S*EBGS. The BGS in steno is also an X, so if you leave our the * you get sex. Well, sometimes I don't fit in the * and I end up writing sex instead of section.
A friend of mine is a major victim of a typo. The lady that typed up her birth certificate apparently wasn't a very good typist. My friend's name is Michelle, and when you look at her birth certificate it's so obvious that the person who typed it up had her fingers in the wrong spot. her name appears on her original birth certificate as Nucgekke !!!