I've seen more and more typos lately. Often it's homophones, as seen above in a recent book I read from one of the big publishers. Newsweek recently confirmed my decision not to subscribe any more by confusing cite and site. Even the New York Times misspelled pedal pushers a couple of years back.
The NYT had an article considering the problem of typos. "As Geoff Shandler, the editor in chief of Little, Brown and Company, told me, “Use of the word processor has resulted in a substantial decline in author discipline and attention. Manuscripts are much longer than they were 25 years ago, much more casually assembled, and beyond spell check (and not even then; and of course it will miss typos if the word is a word) it is amazing how little review seems to have occurred before the text is sent to the editor. Seriously, you have no idea how sloppy some of these things are.”"
Read more here