One of the salesmen at our company managed this one the other day.

He was in an all-fired hurry to get his latest (long-winded, self-aggrandizing, and tiresome) sales mailing piece printed, and in the process slapped another N on the end of his darn, instantly transmogrifying it to the potentially problematic damn.

I was asked my opinion on how best to remedy this...I suggested correction fluid, though I was no more specific than that, as my recommendations may have been taken in the spirit they were made.