^ I completely agree with this. I've seen minor typos in financial documents, published SCOTUS opinions, endless books, scholarly articles and journals etc. I firmly believe that you read what you "want" to read, not what is actually typed. (i.e. we expect a certain word, and see it, whether or not it is correctly spelled), unless we are scrutinizing something with a fine-tooth comb. While this makes us our own worst editor, I think it also means there's a fair chance that with ad-coms reading through hundreds of applications, it won't get a second look unless its egregious.
The kicker: I once saw a (sucessful) application to a top 10 law school: beautifully typed, but with a minor correction in white-out. The individual who submitted it is smart, talented and now a sucessful lawyer, and this apparently did not detract, or at least not enough to deny entry. We're all human, and we all make mistakes. As much as I wish it wasn't true!
Best of luck,
Justin