I know this is the pot calling the kettle black, but check out the egregious spelling error on the cover of this book from O’Reilly (thanks, Colene). They’ve got it right over at Amazon, so they’ve already caught it on the actual cover.
On the subject of spelling and grammatical errors on this site, it’s pretty apparent that I don’t sweat the small stuff. I write entries as quickly as possible, and don’t necessarily spare the time to re-read them. I have a fixed amount of time to pay to this site, so I figure ‘more entries with a few errors’ is preferable to ‘fewer entries with no errors’. In my professional work, I’m much more careful, and happen to live with a superb proofreader.