I suffer badly from this ailment, but with good cause.
I firmly believe that typographical errors are generated by fae folk such as brownies or sprites. They hide in the thickets of sentences as we write then breed their hideous progeny when we think we have cleaned everything.
Before publishing Cobra Flight I used the services of a copy editor, two (2!) proofreaders and every form of electronic grammar checker invented — and still the little bastards made it into the final edition.
I have no doubt that I have taken my immortal soul into my own hands by revealing the activities of these foul sprites and this very post will contain their pioson